chore: Exception when configuration lacks of userinfo definition

Author: peppelinux

src/oidcop/session/claims.py

@@ -5,6 +5,7 @@
 from oidcmsg.oidc import OpenIDSchema
 
 from oidcop.exception import ServiceError
+from oidcop.exception import ImproperlyConfigured
 from oidcop.scopes import convert_scopes2claims
 
 logger = logging.getLogger(__name__)
@@ -129,7 +130,12 @@ def get_user_claims(self, user_id: str, claims_restriction: dict) -> dict:
         """
         if claims_restriction:
             # Get all possible claims
-            user_info = self.server_get("endpoint_context").userinfo(user_id, client_id=None)
+            meth = self.server_get("endpoint_context").userinfo
+            if not meth:
+                raise ImproperlyConfigured(
+                    "userinfo MUST be defined in the configuration"
+                )
+            user_info = meth(user_id, client_id=None)
             # Filter out the claims that can be returned
             return {
                 k: user_info.get(k)