Before a player can perform any operations they need to authenticate with the platform. There are a few authentication options, and some can be used in combination with others. These options are described below.

Username / Password Authentication

Using RegistrationRequest you can create a player with a username / password / displayName combination. If you use this method, the player can sign in on any device with the same credentials and will be logged in and their history will be available. Once a player has registered using RegistrationRequest, they can use the same username / password combination with AuthenticationRequest to login to the platform.

Device Authentication

Perhaps you don't want to force your players to actively login. In these instances, we'll need the ability to identify the device that is being used so we can persist data against the player. To do this, you can perform device authentication. This method registers an identifier (the implementation is dependent on platform) of the device and creates a stub player on the platform.

If you use device authentication, each time the device authenticates it will be identified as the same player and you'll be able to view previous high scores, or use the same playerId in your code.

Device Authentication Persistence! Please be aware that this persistence of device authentication might cause problems if players are either sharing a device or if a player sells a device after authentication. Even if the seller wipes all data off the device before selling it, if the buyer installs GameSparks again, the device may be recognized as previously authenticated, depending on the specific OS implementation, and could be linked to the first player as owner of the device when it was first authenticated.

When using device authentication:

Important: Mobile Device Authentication ID! For mobile device authentication, we strongly recommend that you use an IDFV device ID. Using an IDFA device ID can be unreliable.

Social Authentication

If you don't want players to create a userName / password combination, you can delegate authentication to one of the social providers. Currently these are:

These methods create a player on the platform and also get their list of friends from the provider. You can then use this list of friends to link players with their friends who also play your game.

Some rules are applied when the player is already authenticated or the social profile is already in use:

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