Create a user
You create a new user in your Firebase project by calling the CreateUserWithEmailAndPassword
method or by signing in a user for the first time using a federated identity
provider, such as Google Sign-In
or Facebook Login
.
You can also create new password-authenticated users from the Authentication section of the Firebase console , on the Users page.
Get the currently signed-in user
The recommended way to get the current user is by setting a listener on the Auth object:
Firebase . Auth . FirebaseAuth auth ; Firebase . Auth . FirebaseUser user ; // Handle initialization of the necessary firebase modules: void InitializeFirebase () { Debug . Log ( "Setting up Firebase Auth" ); auth = Firebase . Auth . FirebaseAuth . DefaultInstance ; auth . StateChanged += AuthStateChanged ; AuthStateChanged ( this , null ); } // Track state changes of the auth object. void AuthStateChanged ( object sender , System . EventArgs eventArgs ) { if ( auth . CurrentUser != user ) { bool signedIn = user != auth . CurrentUser && auth . CurrentUser != null ; if ( ! signedIn && user != null ) { Debug . Log ( "Signed out " + user . UserId ); } user = auth . CurrentUser ; if ( signedIn ) { Debug . Log ( "Signed in " + user . UserId ); } } } // Handle removing subscription and reference to the Auth instance. // Automatically called by a Monobehaviour after Destroy is called on it. void OnDestroy () { auth . StateChanged -= AuthStateChanged ; auth = null ; }
By using a listener, you ensure that the Auth object isn't in an intermediate state—such as initialization—when you get the current user.
You can also get the currently signed-in user by calling CurrentUser
. If a
user isn't signed in, CurrentUser
will return null. If a user is signed out,
the user's IsValid()
will return false.
Persist a user's credential
The user's credentials will be stored in the local keystore after a user is signed in. The local cache of user credentials can be deleted by signing the user out. The keystore is platform specific:
- Apple platforms: Keychain Services .
- Android: Android Keystore .
- Windows: Credential Management API .
- OS X: Keychain Services .
- Linux: libsecret , which the user must have installed.
Get a user's profile
To get a user's profile information, use the accessor methods of an instance of Firebase.Auth.FirebaseUser
. For example:
Firebase . Auth . FirebaseUser user = auth . CurrentUser ; if ( user != null ) { string name = user . DisplayName ; string email = user . Email ; System . Uri photo_url = user . PhotoUrl ; // 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 User.TokenAsync() instead. string uid = user . UserId ; }
Get a user's provider-specific profile information
To get the profile information retrieved from the sign-in providers linked to a
user, use the ProviderData
method. For example:
Firebase . Auth . FirebaseUser user = auth . CurrentUser ; if ( user != null ) { foreach ( var profile in user . ProviderData ) { // Id of the provider (ex: google.com) string providerId = profile . ProviderId ; // UID specific to the provider string uid = profile . UserId ; // Name, email address, and profile photo Url string name = profile . DisplayName ; string email = profile . Email ; System . Uri photoUrl = profile . PhotoUrl ; } }
Update a user's profile
You can update a user's basic profile information—the user's display name
and profile photo URL—with the UpdateUserProfile
method. For example:
Firebase . Auth . FirebaseUser user = auth . CurrentUser ; if ( user != null ) { Firebase . Auth . UserProfile profile = new Firebase . Auth . UserProfile { DisplayName = "Jane Q. User" , PhotoUrl = new System . Uri ( "https://example.com/jane-q-user/profile.jpg" ), }; user . UpdateUserProfileAsync ( profile ). ContinueWith ( task = > { if ( task . IsCanceled ) { Debug . LogError ( "UpdateUserProfileAsync was canceled." ); return ; } if ( task . IsFaulted ) { Debug . LogError ( "UpdateUserProfileAsync encountered an error: " + task . Exception ); return ; } Debug . Log ( "User profile updated successfully." ); }); }
Set a user's email address
You can set a user's email address with the UpdateEmail
method. For example:
Firebase . Auth . FirebaseUser user = auth . CurrentUser ; if ( user != null ) { user . UpdateEmailAsync ( "user@example.com" ). ContinueWith ( task = > { if ( task . IsCanceled ) { Debug . LogError ( "UpdateEmailAsync was canceled." ); return ; } if ( task . IsFaulted ) { Debug . LogError ( "UpdateEmailAsync encountered an error: " + task . Exception ); return ; } Debug . Log ( "User email updated successfully." ); }); }
Send a user a verification email
You can send an address verification email to a user with the SendEmailVerification
method. For example:
Firebase . Auth . FirebaseUser user = auth . CurrentUser ; if ( user != null ) { user . SendEmailVerificationAsync (). ContinueWith ( task = > { if ( task . IsCanceled ) { Debug . LogError ( "SendEmailVerificationAsync was canceled." ); return ; } if ( task . IsFaulted ) { Debug . LogError ( "SendEmailVerificationAsync encountered an error: " + task . Exception ); return ; } Debug . Log ( "Email sent successfully." ); }); }
You can customize the email template that is used in Authentication section of the Firebase console , on the Email Templates page. See Email Templates in Firebase Help Center.
Set a user's password
You can set a user's password with the UpdatePassword
method. For example:
Firebase . Auth . FirebaseUser user = auth . CurrentUser ; string newPassword = "SOME-SECURE-PASSWORD" ; if ( user != null ) { user . UpdatePasswordAsync ( newPassword ). ContinueWith ( task = > { if ( task . IsCanceled ) { Debug . LogError ( "UpdatePasswordAsync was canceled." ); return ; } if ( task . IsFaulted ) { Debug . LogError ( "UpdatePasswordAsync encountered an error: " + task . Exception ); return ; } Debug . Log ( "Password updated successfully." ); }); }
Send a password reset email
You can send a password reset email to a user with the SendPasswordResetEmail
method. For example:
string emailAddress = "user@example.com" ; if ( user != null ) { auth . SendPasswordResetEmailAsync ( emailAddress ). ContinueWith ( task = > { if ( task . IsCanceled ) { Debug . LogError ( "SendPasswordResetEmailAsync was canceled." ); return ; } if ( task . IsFaulted ) { Debug . LogError ( "SendPasswordResetEmailAsync encountered an error: " + task . Exception ); return ; } Debug . Log ( "Password reset email sent successfully." ); }); }
You can customize the email template that is used in Authentication section of the Firebase console , on the Email Templates page. See Email Templates in Firebase Help Center.
You can also send password reset emails from the Firebase console.
Delete a user
You can delete a user account with the Delete
method. For example:
Firebase . Auth . FirebaseUser user = auth . CurrentUser ; if ( user != null ) { user . DeleteAsync (). ContinueWith ( task = > { if ( task . IsCanceled ) { Debug . LogError ( "DeleteAsync was canceled." ); return ; } if ( task . IsFaulted ) { Debug . LogError ( "DeleteAsync encountered an error: " + task . Exception ); return ; } Debug . Log ( "User deleted successfully." ); }); }
You can also delete users from the Authentication section of the Firebase console , on the Users page.
Re-authenticate a user
Some security-sensitive actions—such as deleting an account , setting a primary email address , and changing a password —require that the user has recently signed in. If you perform one of these actions, and the user signed in too long ago, the action fails.
When this happens, re-authenticate the user by getting new sign-in credentials
from the user and passing the credentials to Reauthenticate
. For example:
Firebase . Auth . FirebaseUser user = auth . CurrentUser ; // Get auth credentials from the user for re-authentication. The example below shows // email and password credentials but there are multiple possible providers, // such as GoogleAuthProvider or FacebookAuthProvider. Firebase . Auth . Credential credential = Firebase . Auth . EmailAuthProvider . GetCredential ( "user@example.com" , "password1234" ); if ( user != null ) { user . ReauthenticateAsync ( credential ). ContinueWith ( task = > { if ( task . IsCanceled ) { Debug . LogError ( "ReauthenticateAsync was canceled." ); return ; } if ( task . IsFaulted ) { Debug . LogError ( "ReauthenticateAsync encountered an error: " + task . Exception ); return ; } Debug . Log ( "User reauthenticated successfully." ); }); }
Import user accounts
You can import user accounts from a file into your Firebase project by using the
Firebase CLI's auth:import
command. For example:
firebase
auth
:
import
users
.
json
--
hash
-
algo
=
scrypt
--
rounds
=
8
--
mem
-
cost
=
14
