To connect to an ApsaraDB for Redis instance, you must use a password for authentication.
You can customize a password when you create an ApsaraDB for Redis instance. You can also set or modify the password of an instance in the ApsaraDB for Redis console after you create the instance. For more information, see Change or reset the password.
You can enable password-free access for an instance to allow the instance to be connected without using passwords. For more information, see Enable password-free access.