Get user data from a token

API
6

What do you get if you do something like:

fetch("https://api.twitch.tv/helix/users",
    {
        headers: {
            Authorization: 'Bearer ' + BearerToken
        }
    }
).then(function(c) {
    return c.json()
}).then(function(j) {
    console.log(j)
}).catch(function(err) {
    console.log('e', err);
});