[Authorize(Roles = "admin")]
    [Route("user/byUsername/{username}")]
    public async Task<IHttpActionResult> GetUserByName(string username)
    {
        var user = await this.AppUserManager.FindByNameAsync(username);

        if (user != null)
        {
            return Ok(this.TheModelFactory.Create(user));
        }

        return NotFound();

    }