Twitter has users. Mainstream (Silicon Valley) tech and drug dealers are the only two groups to use that term to describe people. And they're both obsessed with manufacturing addiction and exploiting those people. Calling people users is a form of othering.
Let's do better.
Mastodon doesn't have users. Mastodon has people. Call them members if you must. But not users.
Twitter, Facebook, and Google have users. We have people.