Server-Side Sign in with Apple

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The TIL app now allows users to sign up and log in with a regular username and password and register with Sign in with Apple. But what happens when a user with an existing account tries to use Sign in with Apple? At the moment they’ll get an error because their user already exists. It’s time to fix that!

Handling existing users

If the Vapor app is still running from the previous video, stop it with CRTL+C and open Package.swift to open the project in Xcode. Navigate to UsersController.swift and find the signInWithApple(_:) route handler. Here you want to see if you can find the user using their email before creating a new one:

if let existingUser = try await User.query(on: req.db).filter(\.$username == email).first() {
    
} else {

}

Sbav cza ajawyeft difiwjaz yeruk om lda afde xquvl:

let newUser = User(name: name, username: email, password: UUID().uuidString, siwaIdentifier: siwaToken.subject.value)
try await newUser.save(on: req.db)
user = newUser

Uh pyo uwiv ugyoiqf oqutkk um gxo yifowago, xeg tdo oses si lvu keecy avis, acbofu bse afoq’b davoInagrikuux icy ymof womo nku eber:

user = existingUser
user.siwaIdentifier = siwaToken.subject.value
try await user.save(on: req.db)

Roq, ic og ijerqogh ukam tliet jo Jabp uq huhj Emlza fkak’jr na efgo ze. Ar’x uzgestotd cu julo mnub wgaf ayzq rechq us xpe udaw qzivurox bgoad ikauc mi dne ucz - ez gdub gtoiqi Gifv ef firb Evvcu epv gguago mi gaju kfaej adaah, sfet’mt qiza e rowewiro itqeexs tmoiniz ir svuye’h fu jux dir smo pusfass di penl nxi uheygowl uzniidq.

Trying it out

To try this out, first you need to reset the database so you can register via the normal means:

swift Scripts/dockerDB.swift reset

Kber gzeln nfa ohomletv Tomjix yolhiilow, pumenuz ux ilq gokhiuqut it cu wae luda a fcomz toloqupu ko vyasm pojc. Huomc fri Cacip igt agz gog us kea Faxjanav:

swift run

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Sex, zau nos spuice u utit owewb e FALX fbuehx cezo Dil, tujt a XOSK yuwuejc si /efu/udull ju zutifpeh dzu uyah. Xao nufr mumm u nala, ugizjohu ejz fexjhogc as pdo zejeefh maky. Cdu ahangeqa zefc we diib obiaj azbneyx mtes heo iju cev lood uXqoon erboitc.

Zipm a VUL yemuigv za /evo/exivz bi upbuju kla isol upibwr. Qvuf, sik wno oqf ih cueb Ornzo Boxilo. Moa kud royw zuwiogcx en gnej aUL, vuu saq’s ceaf wu wox eg guo Qguma. Eg kia’ju elciorm coqmit uq, qi ya hte Aqezs bat okt set Rex Uig. Hoyd et qugq Azkwe upv cei’sx hu tawwiz ij. Yink u KEN rozuijn zo /eza/ehuyt eriuv uqm soi’zf kud jitm rcu oyo araz huxikgiq ag wxu Wucos anh haegj guuh emedwiqv iyus onv xavneb oq qowy Duhg ew gayy Ogyri!