Firebase में उपयोगकर्ताओं को मैनेज करें

handle = Auth.auth().addStateDidChangeListener { auth, user in
  // ...
}

self.handle = [[FIRAuth auth]
    addAuthStateDidChangeListener:^(FIRAuth *_Nonnull auth, FIRUser *_Nullable user) {
      // ...
    }];

if Auth.auth().currentUser != nil {
  // User is signed in.
  // ...
} else {
  // No user is signed in.
  // ...
}

if ([FIRAuth auth].currentUser) {
  // User is signed in.
  // ...
} else {
  // No user is signed in.
  // ...
}

let user = Auth.auth().currentUser
if let user = user {
  // The user's ID, unique to the Firebase project.
  // Do NOT use this value to authenticate with your backend server,
  // if you have one. Use getTokenWithCompletion:completion: instead.
  let uid = user.uid
  let email = user.email
  let photoURL = user.photoURL
  var multiFactorString = "MultiFactor: "
  for info in user.multiFactor.enrolledFactors {
    multiFactorString += info.displayName ?? "[DispayName]"
    multiFactorString += " "
  }
  // ...
}

FIRUser *user = [FIRAuth auth].currentUser;
if (user) {
  // The user's ID, unique to the Firebase project.
  // Do NOT use this value to authenticate with your backend server,
  // if you have one. Use getTokenWithCompletion:completion: instead.
  NSString *email = user.email;
  NSString *uid = user.uid;
  NSMutableString *multiFactorString = [NSMutableString stringWithFormat:@"MultiFactor: "];
  for (FIRMultiFactorInfo *info in user.multiFactor.enrolledFactors) {
    [multiFactorString appendString:info.displayName];
    [multiFactorString appendString:@" "];
  }
  NSURL *photoURL = user.photoURL;
  // ...
}

let userInfo = Auth.auth().currentUser?.providerData[indexPath.row]
cell?.textLabel?.text = userInfo?.providerID
// Provider-specific UID
cell?.detailTextLabel?.text = userInfo?.uid

id<FIRUserInfo> userInfo = [FIRAuth auth].currentUser.providerData[indexPath.row];
cell.textLabel.text = [userInfo providerID];
// Provider-specific UID
cell.detailTextLabel.text = [userInfo uid];

let changeRequest = Auth.auth().currentUser?.createProfileChangeRequest()
changeRequest?.displayName = displayName
changeRequest?.commitChanges { error in
  // ...
}

FIRUserProfileChangeRequest *changeRequest = [[FIRAuth auth].currentUser profileChangeRequest];
changeRequest.displayName = userInput;
[changeRequest commitChangesWithCompletion:^(NSError *_Nullable error) {
  // ...
}];

Auth.auth().currentUser?.updateEmail(to: email) { error in
  // ...
}

[[FIRAuth auth].currentUser updateEmail:userInput completion:^(NSError *_Nullable error) {
  // ...
}];

Auth.auth().currentUser?.sendEmailVerification { error in
  // ...
}

[[FIRAuth auth].currentUser sendEmailVerificationWithCompletion:^(NSError *_Nullable error) {
  // ...
}];

Auth.auth().languageCode = "fr"
// To apply the default app language instead of explicitly setting it.
// Auth.auth().useAppLanguage()

[FIRAuth auth].languageCode = @"fr";
// To apply the default app language instead of explicitly setting it.
// [[FIRAuth auth] useAppLanguage];

Auth.auth().currentUser?.updatePassword(to: password) { error in
  // ...
}

[[FIRAuth auth].currentUser updatePassword:userInput completion:^(NSError *_Nullable error) {
  // ...
}];

Auth.auth().sendPasswordReset(withEmail: email) { error in
  // ...
}

[[FIRAuth auth] sendPasswordResetWithEmail:userInput completion:^(NSError *_Nullable error) {
  // ...
}];

let user = Auth.auth().currentUser

user?.delete { error in
  if let error = error {
    // An error happened.
  } else {
    // Account deleted.
  }
}

FIRUser *user = [FIRAuth auth].currentUser;

[user deleteWithCompletion:^(NSError *_Nullable error) {
  if (error) {
    // An error happened.
  } else {
    // Account deleted.
  }
}];

let user = Auth.auth().currentUser
var credential: AuthCredential

// Prompt the user to re-provide their sign-in credentials

user?.reauthenticate(with: credential) { error in
  if let error = error {
    // An error happened.
  } else {
    // User re-authenticated.
  }
}

FIRUser *user = [FIRAuth auth].currentUser;
FIRAuthCredential *credential;

// Prompt the user to re-provide their sign-in credentials

[user reauthenticateWithCredential:credential completion:^(NSError *_Nullable error) {
  if (error) {
    // An error happened.
  } else {
    // User re-authenticated.
  }
}];