fix(admin): delete user realm roles

admin/src/admin/lib/keycloak_client.py

@@ -263,7 +263,7 @@ class KeycloakClient:
             for r in self.get_user_realm_roles(user_id)
             if r["name"] in ["admin", "manager", "teacher", "student"]
         ]
-        return self.keycloak_admin.delete_realm_roles_of_user(user_id, roles)
+        return self.keycloak_admin.delete_user_realm_role(user_id, roles)
 
     def delete_user(self, userid):
         self.connect()