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Welcome back everybody Johnny B here with Davis stuck come and in this lesson we are going to pick up



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right where we left off and we are going to do that next step in creating a user which is to log in



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the user.



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OK so we have our register user function right here and now we are going to create our logon functions



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so right below it I'm just going to say phunk log in user.



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OK.



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But before we get started let's go ahead and check out our post man request here.



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We finished up the originator user.



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Now let's check out the luggin user and you'll see that it's pretty similar.



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It has the same header type and actually has the same body type as well.



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The URL is different.



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So actually this Gladding create are you are logging yourself right now.



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When a copy of this account slash logging in let's jump back into Constans in here we're going to need



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a new you or else to say let your child log in Loeb's log in equal in that it is string and interpolate



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the base your L and then add on a counter slash logon.



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And just to reiterate once again these your L's are going to a specific location on the API.



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And and so that so that the API knows what to do with the specific information and the requests that



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it is receiving.



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All right so let's jump back to the service and back in the postman.



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And so it was pretty similar.



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You know the same header the same body but what's different is what the API is doing with it.



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So let me see if I got the.



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Me Make sure you got mongered D and our local host up and running.



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They are.



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So if I send this we should actually be doing a logging request on our local hosts once we send.



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And sure enough here we go.



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We had a successful request.



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You can see here the status 200 which means that everything went ok and we receive as a response from



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our API.



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AJ saw an object with a key of user and a value of the user's e-mail.



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But the important one here is the token.



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OK.



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So remember in less than six we were talking about web requests and API and how some things are locked



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down and so you have to have an authorization token in the header.



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And this is the authorization token that we are going to need to be able to add to create to finish



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the creation of a user process to do sending a message to retrieve messages for the channels et cetera.



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So this is very important.



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OK.



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So let's go ahead and jump back in to execute and and code this out.



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So the ALM of our request is actually pretty similar to the register user function.



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We are going to need to pass in an e-mail which is of type string a password which is also of type string.



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And again we are going to be using our completion handler so that we know when and if the request was



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successful from us to completion at escaping and completion handler.



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And then like we saw in post-bin the header and body are actually the same.



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So I can we can actually just copy this and we'll grab the lowercase e-mail as well.



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And you see that we are now duplicating stuff right.



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So let's go ahead and make a constant for this header.



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So I'm just going to copy this header here or I'm going to cut it actually.



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Now we're going to jump into Constans And then here I'm going to make a new section for headers



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and I'm going to say let.



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I'm going to make this capitalized to fit our constant convention and then I'm going to copy it and



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jump back into our servers and see how you fix this up a little bit.



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I'm going to replace the header right here in the register user Allum of our request with header and



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then right here we can delete this as well.



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Let's clean this up a little bit.



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Bodies OK.



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And then we were ready to create our Alamo fire request.



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So just like we did with the register user We're going to say Alamo fire DOD request.



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So now we are creating our web request and the URL that we want it to go to is the one that we just



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created which is you are l underscore the log in the method it is still a post the parameters the body



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and coding is just on encoding that default and the headers is header that constant that we just created.



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And in the register we did a dot response string.



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Right.



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And that I told you several times that normally we're going to be using with response Jaison.



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So that's the one that we want this time response Dusan because the response is specified in the API



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to be of type.



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Jason OK so we're going to select that one and press return again and rename the data response to response



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and just get rid of that code.



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OK.



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So at this point we have received a response from the API.



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So first off we want to do a check to make sure that we don't have any errors organise if response.



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Result that error is equal to nil meaning there were no errors.



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Everything looks good.



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So we're going to do some stuff here but else we are just going to say completion is false.



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And so that's our completion handler and we're letting any of the functions any of the locations that



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call this function know that the request failed basically.



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And then we're going to do a Debug.



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Print to see what happens.



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We're going to say Response Now result that an error as any.



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And that'll just print out the error.



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But if we were successful we're going to see completion is true.



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So you know in the end the last function that we created the Registered User we didn't really need to



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do anything with the response did we.



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You know we just it was just to register user.



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The API didn't actually send any useful data back to us.



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But this time here in postman we see that we're getting some information back we're getting a solid



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object and now we need to know how to handle receiving.



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Jay song from an API.



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OK so this is going to be called Chase song parsing.



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All right.



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So strap in.



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I'm going to show you a couple of different ways.



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The first is kind of the more lower level at the basics.



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At the base level of J-Zone parsing.



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And it's important to know how to do it this way.



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But then I'm going to show you how to do it with Swiftie Jaison which I think is a much easier way of



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doing it.



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All right.



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So what we're going to do is inside of our response result is is based on value but we need to kind



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of turn that into something that we can use here and it's code.



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So what we're going to do is a rented flat.



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Jaison is equal to a response.



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Result that value.



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And we're going to cast that as a dictionary.



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OK.



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Because it is a dictionary of type string.



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So I remember looking at Tower Jason objects in the past I know that the key is always a string but



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the value could be anything it could be you could be a a ball it could be a string it could be an end



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to it could be another just an object.



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So we're going to cast it as any.



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All right so now we have a choice on variable.



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The syntax for working with Jigsaw dictionary is similar to that.



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I mean we've cast it as a dictionary.



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So really all we have to do to get to it is say if you let email.



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So you know coming over here to postman we know that we have an object with a key of user and then the



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value is going to be a string of our e-mail.



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OK so when I say that e-mail is equal to Jaison and then we're going to drill into that sound object



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and we're going to look for the key called What was it called.



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It was the user.



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OK.



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So user.



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And we're going to cast that as a string.



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And if if we if we get that if there is in fact an object inside of the J sign dictionary called user



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then we're going to set the this variable right here.



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Self-taught user e-mail equal to that values an answer itself that user e-mail is equal to e-mail.



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Not too bad.



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So then we're going to also do the same thing with the token that we see here.



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So now we're looking for this carrot here token.



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So again if you let tokin is equal to Jaison the dictionary that we just created from the Jewson data



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and we're going to search for the token key and if we find it we're going to cast it as a string.



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And if we are successful if we get it then we're going to say self-taught off token is equal to that



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token right there.



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All right.



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And that's it.



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Then once that's successful we can say self-taught is locked in is equal to true because because now



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we have successfully logged in user.



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So that's it.



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That is our logging user function.



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In fact we can use this right away if we jump over to our create account.



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VC I remember the flow is register user logging user create user cerate here instead of just printing



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registered user.



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We're going to call our next API call in lines and say Office service and instance start and we're going



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to say logon user and we are going to pass in.



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Again the email the pass word which is just pass and then the completion handler again we're going to



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say success in order to get rid of this and we're going to see if success may just fall back up if success.



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Let's go ahead and print this print log in user.



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They say a comma and we're going to then also print just to make sure that it worked.



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We're going to see our service start instance dot Hauf token.



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All right.



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I'm going to save that and let's run it and put this back on the success and run it.



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We've got our app open a quick log in don't have an account set up here.



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And real quick let's jump back into safari Let's go to lab.



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And this was the one that we created last time that register.com and I want to use it again.



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So I'm actually just going to delete this object here.



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OK.



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And so that just removes that account object from our database and you can do that with pretty much



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any of the collections and objects.



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In fact let's just let's just take a look real quick look at what we got here.



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Just to kind of go over what we've been doing right now is registering users.



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Those are going to be here and accounts.



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They're also collections here for channels and messages and users that are generated because of the



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work that I've been doing and the while I was creating this app.



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But you can actually delete whole collections and you can edit or delete objects inside of the collections.



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OK.



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So just a quick look at some of your options and lab.



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But anyway so back to exclude and our simulator.



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So I'm going to write here I'm going to say register at test dot com.



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I'm going to put in a password one two three four five six and I'm going to see create a count.



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And if all goes according to plan here in just a second we should see that it logs in and then it should



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print out the last token as well.



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And I think it did just right here.



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Case so this.



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And sure enough logged in user.



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And here is the token.



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So let's check in in labs



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and going to refresh this.



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And once again there it is registred test dot com.



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All right so now we have two out of three of our functions required to create a new user we are registering



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a user.



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And now we are logging in that user so that we get the token so that we can then do the final step of



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adding the user.



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All right.



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So before we finish up here I told you I was going to show you what I think is an easier way of working



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with the sun.



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So let's jump back into our create a count or not create countless go to our service that's swift and



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I am just going to comment this out right here.



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Okay.



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And first off we're going to import so if the Jews want to import Swiftie Jaison can and just go ahead



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and check out their get hub page if you just google for Swiftie and.



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It took me right to get her.



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But if you just google it and then click on it should be the top resort forget hub and you can come



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over here and take a look at it.



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Ken talks about how why the typical way of Giese on handling and swift is not so good.



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Show some examples.



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Kind of like what we were just showing you.



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You have to you know you have to cast it into a dictionary.



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See where to go.



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Yeah you have to cast it into a dictionary and you have to do a whole bunch of if let's to unwrap you



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have to cast it.



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And so what's with the jokes and does it safely handles all of that for you.



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So for instance you you can do something simple just like this instead of having to the flats.



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It handles all of that for you under the hood.



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And so we're going to rewrite this section right here using Swiftie Jaison.



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So the first thing that we're going to do is we need to get the data out of the web response so we're



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going to guard that data equal response



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data.



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Kelce returned.



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OK.



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So we need the data because what Jason does is it creates a chase an object out of the response data.



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So then I'm going to say.



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And you saw an equal and I'm going to say capital Jason and doing initialiser.



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And what we want right here is to just pass in data and the data that we're passing in is data.



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Ok so now we have a chase on object Swiftie J song object and so simply the next couple of steps is



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just setting self-taught user email equal to a song and we're going to drill down into it and get the



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user.



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And what I really like about Swifty Jason is that you can say string value OK and this automatically



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safely unwraps this value for you.



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So you could do the flats and just do that string.



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But what this does for you is it'll say it automatically unwraps it for you or it will just send it



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to a empty string.



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All right.



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So that's super helpful because you know there are times when you need to know if something is nil and



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to do something about it.



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But most of the time if it doesn't exist then you probably just want it to be an empty string or zero.



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If it's for numbers and so I think that this is super helpful.



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So we're just going to do an essay self-taught off token is equal to g song and that is tokin thought



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string value and that's it.



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So these four lines versus these one two three four five six seven eight nine I guess that's technically



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eight eight lines.



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You don't have to do the if let's.



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You don't have to cast into dictionaries you don't have to cast as strings.



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I think it's a super sleek way of handling working with Jason.



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And this is this is this right here is about as easy as it comes working with Jason the the old way.



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If you if you have nested chasing objects or arrays it gets a lot hairier.



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And the benefits of working with the J-Zone become even more apparent.



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All right.



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So so you know it's important to know how to do it this way and just because you might not be in an



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environment where they want to use with the chase on they me you know really want you to do it the old



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fashioned way which is fine.



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So just wanted to show you both ways so that you have options.



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But I am going to continue using with the J song for the rest of this course.



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So I'm going to delete that other stuff and just to make sure that we are still working correctly.



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I'm going to run this again and test this one more time.



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OK.



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So I'm going to log in and have an account sign up here.



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Let's create a new one so register to at test dot com and one two three four five six and create an



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account



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and there we go logged in user and those are off tokin.



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All right so our Jason Reflektor worked perfectly and we are good to go on to our third and final stage



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of creating a user.



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So yeah in this lesson we learned about working with Jason when we talked about it using the the old



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way as well as a different way with Swiftie Jaison.



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So I hope you guys liked both ways.



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Look Mitry to know the first way that I showed you because it's very important that you understand what



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kind of what's going on under the hood.



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But Yesso this has been some good stuff and you guys are enjoying it so far.



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I'm going to go ahead and commit our stuff that we've been working on so far as I want to say get status



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to get and get commit Tasche this is less and 11.



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All right.



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So you guys are excited to finish up the account creation process in the next lesson and I will see



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you there.