A user who has been considered to have higher safety by the recipient user or Marshmallow.
You are considered an authorized user if you meet any of the following conditions:
- Sent a message to null while signed in and was favorited
- Signed up with Marshmallow before April 2023 and followed null on X
- Premium member
For details on the introduction of authorized users, please see the notice
Changes to allowed sender group specifications.
