Hello there! You were probably sent here by a friend. They need your Bitmoji User ID so they can add you as a friend in Friend Comics for Bitmoji – an iPhone app that lets you use Friendmoji Comics outside of Snapchat. This secure tool let's you retrieve your Bitmoji User ID for them so they can use Friendmoji outside of Snapchat. A Bitmoji User ID is like a username for Bitmoji (just like how you have usernames on Instagram, this is the exact same concept).