Updated to align with the official PAR RFC.
Enforce that an access code can only be used once.
Worked with handling client_id.
Added upstream_get to UserInfo classes.
Improved resilience.
Entity ID is the clients identifier. It may also have a client_id.
Updated to align with the official PAR RFC. Enforce that an access code can only be used once. Worked with handling client_id. Added upstream_get to UserInfo classes. Improved resilience. Entity ID is the clients identifier. It may also have a client_id.