How can I make it possible to log into my account on different devices?

Question

Android

I do this
• Log in the user
• I give him a token and save it in SharedPreferences
• When I start the program in the oncreate method, I check for the presence of a token in the SP, if it exists, then the profile window is launched, if not, then the login window
So this is how I need to do so that I can log in with different devices under one account (because if I go in doing everything according to this scheme, the token for the previous account will cease to be valid)?

Answer 1

The token is stored somewhere on the server. Issue the same one for one account.