Generate JWT

        // Get secret key bytes
        var tokenKey = Encoding.UTF8.GetBytes("12345678901234567890123456789012");

        // Create a token descriptor (represents a token, kind of a "template" for token)
        var tokenDescriptor = new SecurityTokenDescriptor
        {
            Expires = DateTime.UtcNow.AddMinutes(10),
            SigningCredentials = new SigningCredentials(
                new SymmetricSecurityKey(tokenKey),
                SecurityAlgorithms.HmacSha256Signature)
        };

        // Create token using that descriptor, serialize it and return it
        var tokenHandler = new JwtSecurityTokenHandler();
        var token = tokenHandler.CreateToken(tokenDescriptor);
        var serializedToken = tokenHandler.WriteToken(token);