Enatega Rider Application : Suggestion - Restrict Rider Login to One Device at a Time

Is your feature request related to a problem? Please describe.
To enhance security and prevent misuse, restrict rider accounts to be logged in on only one device at a time. This will ensure that riders cannot operate multiple devices simultaneously, reducing the risk of fraudulent activities or unauthorized account access.

No files, tests, or entry points are named in the issue. Start by locating the rider authentication and session flow, then define and verify the single-device behavior, including what happens to an existing session when a new login succeeds.

Written by the indexing model from the issue text.