public ActionResult <string> PostMentors([FromBody] Mentor mentor) { if (authenticationRepository.AuthenticateMentor(mentor)) { var claims = new[] { new Claim(JwtRegisteredClaimNames.Sub, mentor.userName) }; var signingKey = new SymmetricSecurityKey( Encoding.UTF8.GetBytes("MyKeyForAuthentication")); var token = new JwtSecurityToken( issuer: "iiht.com", audience: "trainees", expires: DateTime.Now.AddHours(1), claims: claims, signingCredentials: new SigningCredentials(signingKey, SecurityAlgorithms.HmacSha256) ); return(Ok(new TokenResponse { Token = new JwtSecurityTokenHandler().WriteToken(token), Expiration = token.ValidTo })); } return(Unauthorized()); }