Sign in a cached player
A cached player is a player who has their session token cached on the SDK. Every time a sign in event is successful, the SDK caches a session token. A cached player exists if these conditions are fulfilled:
- The player previously signed in with Unity Authentication via anonymous login or platform login.
- The cached session token hasn't been deleted.
To verify if a session token is currently cached for the current profile, use AuthenticationService.Instance.SessionTokenExists.
If the session token exists, then the SignInAnonymouslyAsync() method recovers the existing credentials of a player, regardless of whether they signed in anonymously or through a platform account. A code example would look like this:
using Unity.Services.Authentication;
async Task SignInCachedUserAsync()
{
// Check if a cached player already exists by checking if the session token exists
if (!AuthenticationService.Instance.SessionTokenExists)
{
// if not, then do nothing
return;
}
// Sign in Anonymously
// This call will sign in the cached player.
try
{
await AuthenticationService.Instance.SignInAnonymouslyAsync();
Debug.Log("Sign in anonymously succeeded!");
// Shows how to get the playerID
Debug.Log($"PlayerID: {AuthenticationService.Instance.PlayerId}");
}
catch (AuthenticationException ex)
{
// Compare error code to AuthenticationErrorCodes
// Notify the player with the proper error message
Debug.LogException(ex);
}
catch (RequestFailedException ex)
{
// Compare error code to CommonErrorCodes
// Notify the player with the proper error message
Debug.LogException(ex);
}
}Note that the sample code is a method only, not a class.