public override async Task <DeleteAllCustomersResponse> DeleteAllCustomers(DeleteAllCustomersRequest request,
                                                                                   ServerCallContext context)
        {
            if (await repository.DeleteAllCustomers())
            {
                return new DeleteAllCustomersResponse {
                           Result = "SUCCESS", Message = "All customers deleted"
                }
            }
            ;

            return(new DeleteAllCustomersResponse {
                Result = "FAILURE", Message = "Internal error"
            });
        }
    }