diff --git a/djaosdb/caosdb_client.py b/djaosdb/caosdb_client.py
index 5200bd55a220804a4d4d722ccfba6bdda407e7ac..8b1a9ebf90821b8903bf76dcaa63caf66164a472 100644
--- a/djaosdb/caosdb_client.py
+++ b/djaosdb/caosdb_client.py
@@ -186,9 +186,14 @@ class DefaultCaosDBClientDelegate:
     def find_auth(self, record_type, *args, **kwargs):
         if record_type == "caosdb_auth_user":
             name = kwargs["filter"]["elements"][-1]["v"]
-            print("find " + name)
             res = self._caosdb.administration._retrieve_user(name)
-            print(res)
+            columns = ["id", "password", "last_login", "is_superuser",
+                       "username", "first_name", "last_name", "email",
+                       "is_staff", "is_active", "date_joined"]
+            rows = [(0, None, None, True, "tf", "t", "f", "tf@example.com",
+                     True, True, None,)]
+            return FindResult(rows, columns)
+        return FindResult([], [])
 
     def list_record_type_names(self):
         res = self._caosdb.execute_query("SELECT name FROM RECORDTYPE")
@@ -246,6 +251,9 @@ class DefaultCaosDBClientDelegate:
         c.insert(unique=False)
         return InsertManyResult(c)
 
+    def update_many_auth(self, record_type: str, filter, update):
+        return UpdateManyResult([1])
+
     def update_many(self, record_type: str, filter, update):
         res = self._find(record_type, filter=filter)
         update_set = update["$set"]
@@ -256,7 +264,8 @@ class DefaultCaosDBClientDelegate:
                 if hasattr(val, "isoformat"):
                     val = val.isoformat()
                 e.get_property(p).value = val
-        res.update()
+        if res:
+            res.update()
         return UpdateManyResult(res)
 
     def add_foreign_key(self, record_type, *args, **kwargs):
@@ -432,6 +441,8 @@ class CaosDBClient:
         -------
         """
         LOGGER.debug("update_many(%s, %s)", args, kwargs)
+        if args[0].startswith("caosdb_auth_"):
+            return self._delegate.update_many_auth(*args, **kwargs)
         return self._delegate.update_many(*args, **kwargs)
 
     def drop_record_type(self, *args, **kwargs):