[troubleshooting guide]: Pass the database password on every connection (redis-cli -a, or the password field in the client config). If you use a user other than default, send AUTH username password, because AUTH with a bare password only authenticates the default user. Confirm TLS is on when the subscription requires it (rediss scheme), since a plaintext connection to a TLS-only endpoint can fail at auth too.

Context: Commands against a Redis Cloud database return NOAUTH Authentication required even though the endpoint is reachable. Redis Cloud databases always require authentication with the database password.

## Matched source
Source: Source: https://github.com/delovoymotiv/anteroslogos/blob/HEAD/docs/REDIS_SETUP.md
Original query: "Redis Cloud: NOAUTH Authentication required - password not passed"
Key terms: authentication, cloud, noauth, passed, password, redis, required