Implement the necessary endpoints for performing CURD operations on the `AUTHORIZATIONS` relation

[gridhead]

Implement the necessary endpoints for performing CURD operations on the AUTHORIZATIONS relation

Related to #751

[github-actions]

This issue is stale because it has been open for 60 days with no activity.

[gridhead]

Shut up, Stalebot!

[sdglitched]

@gridhead, a part of this is already implemented in #781. Could you please assign it to me as well along with others who have contributed in it?