You can find your unique user ID (UID) in the game's settings by following these steps:
1. Go to Settings (tap the gear icon in the top-right corner)
2. Look at the bottom of your screen and find your app version (e.g. Mythic Legends 126.96.36.19967)
3. Tap on the piece of text to reveal your unique user ID (UID)
4. Tap the copy icon beside it
This user ID (UID) is unique to you and should not be shared with anyone other than the support team.