How Do I Find a Twitter Account?

You can find a Twitter account by searching for the person’s name or handle using the X search bar. For giveaways, this is helpful when verifying if someone followed you. Neither a tweet picker nor Gleam can check an X follow automatically, because X's API no longer allows it. Gleam records each entrant's X handle, so you can check their follow by hand before you announce a winner.

No. X doesn't reveal who owns an account. The bio, join date, linked websites and posting history give you clues, but none of it proves who someone is.

For a giveaway you rarely need their identity. You need a real person who did what your rules asked. Entrants log in with X, so each handle on your Actions / Entries tab is genuinely theirs. On the Business Plan and above, switch on Reject Throwaway Accounts on your X Actions, and use the cheating and fraud checks to invalidate anything suspicious before you draw again.