2023-05-09 | auth: Implement "Authorization Code Flow"...Implement the "Authorization Code Flow" for the authentication of users.
* gn3/auth/authentication/oauth2/grants/authorisation_code_grant.py: query and
save the authorisation code.
* gn3/auth/authentication/oauth2/models/authorization_code.py: Implement the
`AuthorisationCode` model
* gn3/auth/authentication/oauth2/models/oauth2client.py: Fix typo
* gn3/auth/authentication/oauth2/server.py: Register the
`AuthorisationCodeGrant` grant with the server.
* gn3/auth/authentication/oauth2/views.py: Implement `/authorise` endpoint
* gn3/templates/base.html: New HTML Templates of authorisation UI
* gn3/templates/common-macros.html: New HTML Templates of authorisation UI
* gn3/templates/oauth2/authorise-user.html: New HTML Templates of
authorisation UI
* main.py: Allow both "code" and "token" response types.
auth/implement-authorization-code-flow | Frederick Muriuki Muriithi |