I'm using Firebase to save what the player gets in Databases.
I'm using the SystemInfo.deviceUniqueIdentifier to get a unique id.
I would like to use some kind of unique id from Google so the player can change the phone without losing anything.
I have tried GetEmail and GetTokenId with the corresponding Request in the Build (), but when I try it it gives me an empty value, there is no way.
Can someone help me?