API - add refresh token

fittrackee/oauth2/client.py

@@ -19,7 +19,7 @@ def create_oauth_client(metadata: Dict, user: User) -> OAuth2Client:
         'client_uri': metadata['client_uri'],
         'redirect_uris': metadata['redirect_uris'],
         'scope': metadata['scope'],
-        'grant_types': ['authorization_code'],
+        'grant_types': ['authorization_code', 'refresh_token'],
         'response_types': ['code'],
         'token_endpoint_auth_method': 'client_secret_post',
     }

fittrackee/oauth2/config.py

@@ -1,7 +1,7 @@
 from authlib.oauth2.rfc7636 import CodeChallenge
 from flask import Flask
 
-from .grants import AuthorizationCodeGrant
+from .grants import AuthorizationCodeGrant, RefreshTokenGrant
 from .server import authorization_server
 
 
@@ -12,3 +12,4 @@ def config_oauth(app: Flask) -> None:
     authorization_server.register_grant(
         AuthorizationCodeGrant, [CodeChallenge(required=True)]
     )
+    authorization_server.register_grant(RefreshTokenGrant)