FIX #1: fetch metadata from /.well-known/openid-configuration

auth.py

@@ -17,19 +17,16 @@ for value in (OAUTH_CLIENT_ID, OAUTH_CLIENT_SECRET, OAUTH_SCOPES, OPENID_PROVIDE
     if value is None:
         raise ValueError("Missing environment variable")
 
-AUTHORIZE_URL = OPENID_PROVIDER_URL + "/oauth/authorize"
-ACCESS_TOKEN_URL = OPENID_PROVIDER_URL + "/oauth/token"
 USER_INFO_URL = OPENID_PROVIDER_URL + "/oauth/userinfo"
+METADATA_URL = OPENID_PROVIDER_URL + "/.well-known/openid-configuration"
 
 oauth = OAuth()
 oauth.register(
     name="huggingface",
     client_id=OAUTH_CLIENT_ID,
     client_secret=OAUTH_CLIENT_SECRET,
-    access_token_url=ACCESS_TOKEN_URL,
-    authorize_url=AUTHORIZE_URL,
-    api_base_url=OPENID_PROVIDER_URL,
     client_kwargs={"scope": OAUTH_SCOPES},
+    server_metadata_url=METADATA_URL,
 )