To change a sub-user's authentication, provide the following information:

1. userId: The user ID of the user you want to update.

2. country: The country of the user you want to update.

3. username: The new username (10 to 15 characters long).

4. password: The new password (exactly 10 characters long).

5. authtype: The new auth type of sub-user (user or socks).