Firebase Convert Anonymous to Permanent Account Error - ios

Question

I have the user already Signed in Anonymously in my app through the following code:
Auth.auth().signInAnonymously { (result, error) in
if let error = error {
Auth.auth().handleFireAuthError(error: error, vc: self)
debugPrint(error)
}
}
Then at one point I require the user to sign up and I am using the following code to link the Anonymous account to a permanent account:
guard let email = userEmailTextField.text, email.isNotEmpty,
let password = userPasswordTextField.text, password.isNotEmpty else {
simpleAlert(title: "Error", msg: "Please fill out all fields.")
return
}
guard let confirmPass = userRepeatPasswordTextField.text , confirmPass == password else{
simpleAlert(title: "Error", msg: "Passwords do not match.")
return
}
guard let authUser = Auth.auth().currentUser else {
return
}
let credential = EmailAuthProvider.credential(withEmail: email, link: password)
authUser.link(with: credential) { (result, error) in
if let error = error {
debugPrint(error)
Auth.auth().handleFireAuthError(error: error, vc: self)
self.activityIndicator.stopAnimating()
return
}
guard let fireUser = result?.user else {return}
let artUser = User.init(id: fireUser.uid, email: email , stripeId:"")
//Upload to Firestore
self.createFirestoreUser(user: artUser)
}
But I get an error here. I put break point and this is where the execution stop authUser.link(with: credential) { (result, error) in
This is the error I am getting:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** +[NSURLComponents initWithString:]: nil URLString parameter'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff23e39f0e __exceptionPreprocess + 350
1 libobjc.A.dylib 0x00007fff50ad79b2 objc_exception_throw + 48
2 Foundation 0x00007fff259659ca -[__NSConcreteURLComponents URL] + 0
3 Foundation 0x00007fff259673a8 +[NSURLComponents componentsWithString:] + 33
4 Silobee 0x000000010b144c52 +[FIRAuthWebUtils parseURL:] + 98
5 Silobee 0x000000010b16c638 __56-[FIRUser linkAndRetrieveDataWithCredential:completion:]_block_invoke_3 + 440
6 Silobee 0x000000010b16b084 __51-[FIRUser internalGetTokenForcingRefresh:callback:]_block_invoke + 340
7 Silobee 0x000000010b15df8c __65-[FIRSecureTokenService fetchAccessTokenForcingRefresh:callback:]_block_invoke + 156
8 Silobee 0x000000010b13fa7b __38-[FIRAuthSerialTaskQueue enqueueTask:]_block_invoke + 155
9 libdispatch.dylib 0x0000000110850f11 _dispatch_call_block_and_release + 12
10 libdispatch.dylib 0x0000000110851e8e _dispatch_client_callout + 8
11 libdispatch.dylib 0x00000001108586fd _dispatch_lane_serial_drain + 788
12 libdispatch.dylib 0x00000001108592c5 _dispatch_lane_invoke + 476
13 libdispatch.dylib 0x000000011085851c _dispatch_lane_serial_drain + 307
14 libdispatch.dylib 0x000000011085928f _dispatch_lane_invoke + 422
15 libdispatch.dylib 0x0000000110864b65 _dispatch_workloop_worker_thread + 719
16 libsystem_pthread.dylib 0x00007fff51b37a3d _pthread_wqthread + 290
17 libsystem_pthread.dylib 0x00007fff51b36b77 start_wqthread + 15
)
libc++abi.dylib: terminating with uncaught exception of type NSException

Answer 1

Just saw where my problem is! Instead of this:
let credential = EmailAuthProvider.credential(withEmail: email, link: password)
I had to write this:
let credential = EmailAuthProvider.credential(withEmail: email, password: password)
One small details and stoped my code from working