public StandardResult Authenticate(Users user, AppSettings appSettings) { try { // validate in db first. next version //_users.SingleOrDefault(x => x.Username == username && x.Password == password); // return null if user not found if (user == null) { return(StandardResult.WarningResult("authentication.warning")); } user.FirstName = "Luis"; user.LastName = "Espinoza"; // authentication successful so generate jwt token 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.FirstName) }), Expires = DateTime.UtcNow.AddDays(7), SigningCredentials = new SigningCredentials(new SymmetricSecurityKey(key), SecurityAlgorithms.HmacSha256Signature) }; var token = tokenHandler.CreateToken(tokenDescriptor); user.Token = tokenHandler.WriteToken(token); // remove password before returning user.Password = null; // result.Data = user; return(StandardResult.SuccessResult("authentication.success", user)); } catch (Exception ex) { return(StandardResult.FailResult("authentication.fails", ex)); } }