Error Generating Token

[soixantseize]

Thank you for sharing this project. I was having trouble generating a token and getting the following error:

System.ArgumentException: IDX10401: Expires: '04/13/2017 15:10:15' must be after NotBefore: '04/13/2017 18:30:23'.

I added a new NotBefore SecurityTokenDescriptor and it fixed the problem. New GenerateToken method in TokenAuthController.cs:

private string GenerateToken(ApplicationUser user, DateTime expires)
        {
            var handler = new JwtSecurityTokenHandler();

            ClaimsIdentity identity = new ClaimsIdentity(
                new GenericIdentity(user.Email, "TokenAuth"),
                new[] { new Claim("ID", user.Email.ToString())}
            );

            var securityToken = handler.CreateToken(new SecurityTokenDescriptor
            {
                Issuer = TokenAuthOption.Issuer,
                Audience = TokenAuthOption.Audience,
                SigningCredentials = TokenAuthOption.SigningCredentials,
                Subject = identity,
                **NotBefore = DateTime.Now,**
                Expires = expires
            });
            return handler.WriteToken(securityToken);
        }

[Longfld]

private string GenerateToken(ApplicationUser user, DateTime expires)

I am not sure ApplicationUser : user in GenerateToken method, I have my User class