I mean if on Pixelfed you @pics@lemmy.world, what happens if there’s a user with that name. Does it post to the community or send a message to the user somehow?
On lemmy communities start with !
while users start with … but it looks like you used
to reference the community
Both. The text data is in the database of all instances that are federated. Your account credentials are only stored on the instance you’re registered to.