public async Task <IActionResult> Login([FromBody] UserDetailsViewModel model)
        {
            var user = await UserService.Authenticate(model.Username, model.Password);

            if (user == null)
            {
                return(Unauthorized());
            }

            var tokenHandler    = new JwtSecurityTokenHandler();
            var key             = Encoding.ASCII.GetBytes(AppSettings.Secret);
            var tokenDescriptor = new SecurityTokenDescriptor
            {
                Subject = new ClaimsIdentity(new Claim[]
                {
                    new Claim(ClaimTypes.Name, user.Id.ToString())
                }),
                Expires            = DateTime.UtcNow.AddDays(5),
                SigningCredentials = new SigningCredentials(new SymmetricSecurityKey(key), SecurityAlgorithms.HmacSha256Signature)
            };
            var token       = tokenHandler.CreateToken(tokenDescriptor);
            var tokenString = tokenHandler.WriteToken(token);
            var tokenModel  = new
            {
                Id        = user.Id,
                Username  = user.Username,
                FirstName = user.FirstName,
                LastName  = user.LastName,
                Token     = tokenString
            };

            return(Ok(tokenModel));
        }