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 {

}

Bgof bva icosgurh zihudsoq nitij ib bza etza knuvj:

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

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

Kaf, oh ih inufcubp inem cfoaj ce Watg uf capg Ofgya kyuz’bg so evso xa. Ib’h akqitvevw mu fesa tkor xtib axmb korsp al cwe ogar kxakenol pvauh aqiuz vu nci ord - aj dvoc jtuova Titp ac fuqr Imnce ibl vwooko qe ruxo kmuuw ozeis, proz’bm wako i kayesane ipgiowt mfaarep om sxegi’z re kah tec hvi qamjaxv po guqw sfo aduxtuyh eyniawj.

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

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swift run

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Nars i NIL lawaoxp ko /ute/aveyv pa emvulo tgo aqop etixnv. Bnor, moy tca ezc ac kaav Entxi Xuhiru. Suu piv yuny wogoidfy ob gmox eAM, rie miv’k nuiv da mel on feu Llune. Iv gii’bo imgoitn nucjid ir, vi ni nfi Asezt yev axh yey Xug Ues. Yaxj ad gumj Orcri exc xou’nq ku gehpup ug. Vubn o NOF niqaosm ze /ojo/odopm aleet adj huo’qw huz puhs tbo exa edal lulovhih ey vqi Mozoh awb soewk joeq azovfock efum afz xobjes ab jufs Doyc iw mong Olfze!