public async Task <ActionResult> PostUserRoles(int userId, RoleModel role)
        {
            try
            {
                var user = await _userService.GetAsync(userId);

                if (user == null)
                {
                    return(NotFound("User not found"));
                }

                await _userRoleService.AssociateAsync(userId, role);

                return(Created($"/api/v2/users/{userId}/roles", role));
            }
            catch (System.ApplicationException ex)
            {
                return(StatusCode(StatusCodes.Status422UnprocessableEntity, ex.Message));
            }
            catch (System.Exception)
            {
                return(StatusCode(StatusCodes.Status500InternalServerError, "A server error has occurred"));
            }
        }