I will integrate identityserver4 in dotnet app

I'll create identityserver4 functionalities in your system for authentication and authorization.

The below things could be included.

1. Duende Identity Server with OAuth2 and grant types
2. Authentication-authorization using claims
3. JWT/reference tokens
4. Client management
5. Access management
6. Scope management
7. Adding custom claims to the token
8. User subscriptions feature
9. 2FA and email confirmation
10. User login & registration
11. Forgot/Reset password
12. OTP login
13. Social logins like Google, Facebook, Azure login etc..
14. Configurations caching