How to find your Twitch username on Android phone device
Open Twitch App on your Android phone device.
Tap your profile photo in the upper left corner of the top menu bar.
On your account page, take note of your Twitch username.
Type in your Twitch username to QRSocial App for Android and tap Save.
Your profile link and your QR Code is private, when you share it with others, they can view or add your profile.