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 or tests are named. Start by locating the rider authentication and session-handling entry points, then trace how login state is stored and invalidated. Done should mean a rider cannot maintain active sessions on multiple devices, with coverage for the second-device login behavior.

Written by the indexing model from the issue text.