Authorization server

Hello. 

A solution is needed for the following task.

There is modular software on the client side that supports multi-session on a subscription basis.

Access to the software is verified through tokens. The tokens contain information about the subscription validity period, the number of allowed sessions, and an index (responsible for the configuration of the software modules).

A backend on the server side (VPS) is needed that is responsible for: 

1. Verifying authorization tokens and their initial initialization (authorization request via HTTP:Request  -->  "application/json"). 

2. Upon successful authorization, the server opens access to the boot file with the allowed index and monitors the number of active sessions.

3. The database with tokens and their parameters should be replenished either on the server through admin access or through separate software outside the server.

4. The database with tokens should contain information about the subscription validity period, the number of allowed sessions, and the index.