Unsername in get parameter?

It is possible to use name parameter when user join room like:
"meet.jit.si/dqsdqdjjkjj?username=toto "

Best regards

There is no such feature.

Ok, then can you explain me, how the user name is stored?

You are asking about the display name right?

Yes sorry.
When i change it in browser he looks like to be save ?

It is stored in the localstorage.