Support for the GET /oauth/authorize is broken - returns 500

Just using this example to explore the library, and hard to tell how things are supposed to fit together without docs or a (working) sample.

To reproduce the problem, just setup and run (flask run)

Verify
~~~
curl -u ${client_id}:${client_secret} -XPOST http://127.0.0.1:5000/oauth/token -F grant_type=password -F username=${username} -F password=${password} -F scope=profile
~~~
works fine/as expected.

Then try (from a web browser probably but thats what I was trying to figure out)
GET http://127.0.0.1:5000/oauth/authorize

Crashes cuz
~~~
,,,
File "/home/lewis/.local/lib/python3.10/site-packages/flask/app.py", line 1796, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
File "/mnt/c/Sandbox/SimoneOAuth2/example-oauth2-server/website/routes.py", line 101, in authorize
grant = authorization.get_consent_grant(end_user=user)
AttributeError: 'AuthorizationServer' object has no attribute 'get_consent_grant'
~~~