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. Start by locating the rider login and session-handling flow, then determine how active devices are tracked and how a second login should be rejected; done means concurrent rider sessions cannot remain active on multiple devices.

Written by the indexing model from the issue text.