How to limit app users access? For example: login expired

[ooooooo (Jr)]

Please, can someone help me?

[aamee (contriver)]

How to limit access to the app?

Hello, Does your app have a login interface? You can use Firebase to store the device IDs then when the app open, it checks if the device ID is in the list and also store it on the device in case the user try to open the app without internet.