Fix an issue for my laravel project

I use multiple URLs for my clients' login link, each client have their own unique login URL.

Issue : Once Client A logged in with his url, he able to access other client's url. But when he visit his own url, he should stay on dashboard instead of doing redirection.


Example:

domain.com/demo sign-in phone A and activate Instagram

domain.com/ken sign in phone B and activate Facebook

domain.com/demo visit domain.com/demo stay dashboard

domain.com/demo visit domain.com/ken redirect to Facebook

domain.com/ken visit domain.com/ken stay dashboard

domain.com/ken visit domain.com/demo redirect to Instagram