appUser_JWT

var jwt = require('jsonwebtoken');

// Generate your own secret key for your app here https://app.supportkit.io
var KEY_ID = '55e9f9bf7a0ce5ca2d429c17';
var SECRET = 'BFJJ88naxc5PZNAMU9KpBNTR';

var signJwt = function(userId) {
    return jwt.sign({
        scope: 'appUser',
        userId: userId
    },
    SECRET,
    {
        header: {
            kid: KEY_ID
        }
    });
}

i get -> jwt is malformed