Tair (Redis OSS-compatible) requires password authentication by default. Two options are available: connect with a password, or enable password-free access within the same Virtual Private Cloud (VPC).
Connect with a password
Set a password when you create the instance, or change it later in the Tair console. See Change or reset the password.
Use password-free access
If your application is in the same VPC as the Tair instance, enable password-free access to allow connections without a password. See Enable password-free access.