Anonymously:
Lowest friction sign-in method; this does not require the player to enter any credentials.
The player can continue with their progress on the same device. However, they will not be able to recover their account if the device is lost or if the game is uninstalled.
Recoverable identity providers:
Requires the players to authenticate through a third-party identity provider or custom identity solution.
Once the player is authenticated, their account becomes recoverable and they can login to the same account from another device