Get User by OAuth Token

Twitch.js

// Convert username to ID using OAuth (for logged in user)

    function convert_username_OAuth(token){
        $.ajax({

            type: "GET",
            url: "https://api.twitch.tv/kraken/user",
            headers: {
                "Client-ID": "vaiynh6nnd2nxpf6wshnj4v4zxxqz2",
                "Accept": "application/vnd.twitchtv.v5+json",
                "Authorization": "OAuth "+ token
            },

            success: function(data){
                
            // call get_user_channels passing the ID gained in this request
                get_user_channels(data._id);
            }
        });
    }

// Get user channels

    function get_user_channels(id){
        $.ajax({

            type: "GET",
            url: "https://api.twitch.tv/kraken/users/"+id+"/follows/channels",
            headers: {
                "Client-ID": "vaiynh6nnd2nxpf6wshnj4v4zxxqz2",
                "Accept": "application/vnd.twitchtv.v5+json"
            },

            success: function(data){

            // empty the default channels

                channel_names = [];

                var i = 0;

            // push user's followed channels into channel_names array

                for(i; i < data.follows.length; i++){
                    channel_names.push(data.follows[i].channel.name);
                }

            // call convert_channels passing the now populated array of channel names
                
                convert_channels(channel_names);
            }

        });

    }