I forgot my username how do I change it?!

How do u change ur username

Telling me to log into Facebook but I'm logged in with my email address and can't figure out how to long in with Facebook lol

How do I change it

I forgot my username

I forgot my username

I forgot my username please

I forgot my username. Help.

forgot username

I don't know my username & now I can't log in smh

I don't know my username and now I can't log in

Help

I don't know my user name

How do I get it back

I don't remember my username

Don't know my username

...

Help

Can't get my username

I forgot my username how do I change it