google sign in sign in flow canceled iOS - ios

Question

I'm writing an iOS app that has to use google sign in. It compiles fine but when it runs and I try to sign in with a button, the sign in flow is interrupted:
This is the error: Optional("The operation couldn’t be completed. (com.google.GIDSignIn error -4.)")
error with signing in: Optional(Error Domain=com.google.GIDSignIn Code=-5 "The user canceled the sign-in flow." UserInfo={NSLocalizedDescription=The user canceled the sign-in flow.})
In the simulator, when I press the button, it will show the dialog box asking whether it is ok for the app to access google and then it will just disappear after a second or two.
Here is my ViewController:
//
// ViewController.swift
// frcscout
//
// Created by Elliot Scher on 12/20/22..
//
import UIKit
import GoogleSignIn
import GTMSessionFetcher
import GoogleAPIClientForREST
class ViewController: UIViewController {
#IBOutlet weak var signInButton: UIButton!
private let service = GTLRSheetsService()
override func viewDidLoad() {
super.viewDidLoad()
googleSignIn { signInStatus in
if signInStatus == true {
self.signInButton?.setTitle("Sign out", for: .normal)
print("Signed in!")
} else {
self.signInButton?.setTitle("Sign in", for: .normal)
print("Issues with signing in...")
}
}
}
#IBAction func signInPressed(_ sender: UIButton) {
print("Sign in pressed")
let user = GIDSignIn.sharedInstance.currentUser
if (user == nil) {
googleSignIn() { success in
if success == true {
sender.setTitle("Sign out", for: UIControl.State.normal)
} else {
return
}
}
} else {
GIDSignIn.sharedInstance.signOut()
self.service.authorizer = nil
sender.setTitle("Sign in", for: UIControl.State.normal)
}
}
}
extension ViewController {
func googleSignIn(completionHandler: #escaping (Bool) -> Void) {
GIDSignIn.sharedInstance.restorePreviousSignIn { user, error in
if error == nil {
print("Managed to restore previous sign in!\nScopes: \(String(describing: user?.grantedScopes))")
self.requestScopes(googleUser: user!) { success in
if success == true {
completionHandler(true)
} else {
completionHandler(false)
}
}
} else {
print("No previous user!\nThis is the error: \(String(describing: error?.localizedDescription))")
let signInConfig = GIDConfiguration.init(clientID: K.clientID)
GIDSignIn.sharedInstance.signIn(with: signInConfig, presenting: self) { gUser, signInError in
if signInError == nil {
self.requestScopes(googleUser: gUser!) { signInSuccess in
if signInSuccess == true {
completionHandler(true)
} else {
completionHandler(false)
}
}
} else {
print("error with signing in: \(String(describing: signInError)) ")
self.service.authorizer = nil
completionHandler(false)
}
}
}
}
}
func requestScopes(googleUser: GIDGoogleUser, completionHandler: #escaping (Bool) -> Void) {
let grantedScopes = googleUser.grantedScopes
if grantedScopes == nil || !grantedScopes!.contains(K.grantedScopes) {
let additionalScopes = K.additionalScopes
GIDSignIn.sharedInstance.addScopes(additionalScopes, presenting: self) { user, scopeError in
if scopeError == nil {
user?.authentication.do { authentication, err in
if err == nil {
guard let authentication = authentication else { return }
// Get the access token to attach it to a REST or gRPC request.
// let accessToken = authentication.accessToken
let authorizer = authentication.fetcherAuthorizer()
self.service.authorizer = authorizer
completionHandler(true)
} else {
print("Error with auth: \(String(describing: err?.localizedDescription))")
completionHandler(false)
}
}
} else {
completionHandler(false)
print("Error with adding scopes: \(String(describing: scopeError?.localizedDescription))")
}
}
} else {
print("Already contains the scopes!")
completionHandler(true)
}
}
}
Can anyone help me fix this? Thanks!!