How to use Redis and Redis-Sentinel without saving passwords in clear-text?

Question

I use Redis 6.2 services on different servers, and each one of them has a Redis Sentinel instance.

For each Redis instance, I have a redis.conf that stores:

1. The password that clients and Sentinel use to authenticate as requirepass <password>

For each Sentinel instance, I have a sentinel.conf that stores:

2. The password Sentinel uses to authenticate with the Redis services as sentinel auth-pass <master-name> <password>

3. The password clients use to authenticate with the Sentinel service as requirepass <password>

4. The password Sentinel uses to authenticate with other Sentinels as sentinel sentinel-pass <password>

Now, I'm trying to eliminate clear text passwords.

By using ACL, I'm able to store the password hashed in the service and remove (1) from redis.conf.

I might be able to eliminate (3) by using ACL for the Sentinel.

However, what are my options if I want to keep the passwords, don't want to store them in the .conf files (or in env. variables), especially the Redis master password in sentinel.conf (2)?

Thanks!