private static void KeystoneAssociateGroupWithProjectPermission(IamClient iamClient)
        {
            var keystoneGrantPermissionToGroupOnProjectRequest = new KeystoneAssociateGroupWithProjectPermissionRequest()
            {
                ProjectId = "",
                GroupId   = "",
                RoleId    = "",
            };

            try
            {
                var keystoneGrantPermissionToGroupOnProjectResponse =
                    iamClient.KeystoneAssociateGroupWithProjectPermission(keystoneGrantPermissionToGroupOnProjectRequest);
                Console.WriteLine(
                    JsonConvert.SerializeObject(keystoneGrantPermissionToGroupOnProjectResponse.HttpStatusCode));
            }
            catch (RequestTimeoutException requestTimeoutException)
            {
                Console.WriteLine(requestTimeoutException.ErrorMessage);
            }
            catch (ServiceResponseException clientRequestException)
            {
                Console.WriteLine(clientRequestException.HttpStatusCode);
                Console.WriteLine(clientRequestException.ErrorCode);
                Console.WriteLine(clientRequestException.ErrorMsg);
            }
            catch (ConnectionException connectionException)
            {
                Console.WriteLine(connectionException.ErrorMessage);
            }
        }