You can find your username in two places:
1. Right under your email address in your profile settings.
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2. Listed at the bottom of the page when you click into “Add Friends".
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It’s a combination of your name and numbers, so it might look something like “logan12345.”
If you would like to change your username:
- Tap on Profile and then the gear in the upper left corner.
- Tap on the 'Account' section, and you'll see a place to edit your username.
(Example from iOS)