This discord regex supports both the new and the old version of discord names.

Old: NAME#[0001-9999]

• Between 2 and 32 characters.
• Any character except # is allowed

New: NAME

• Between 2 and 32 characters.
• Latin, lowercase letters are allowed (a-z)
• All numbers are allowed. (0-9)
• Underscores are allowed. (_)
• Periods are allowed. (.)
  • You cannot have two consecutive period characters.
  • Ex: f.y.17 is allowed, while f.y..17 isn't.

Unlike many other discord regexes, this one does not allow the #0000 tag, and it does not allow having two consecutive period characters.