API - init OAuth server and oauth clients creation

fittrackee/oauth2/config.py

@@ -0,0 +1,14 @@
+from authlib.oauth2.rfc7636 import CodeChallenge
+from flask import Flask
+
+from .grants import AuthorizationCodeGrant
+from .server import authorization_server
+
+
+def config_oauth(app: Flask) -> None:
+    authorization_server.init_app(app)
+
+    # supported grants
+    authorization_server.register_grant(
+        AuthorizationCodeGrant, [CodeChallenge(required=True)]
+    )