How can I issue the set auth-pass in Redis Sentinel without the password showing up in the Redis Sentinel console

[Brendan Furey]

Redis Version : 3.2.10

After changing the Redis Password, I also need to dynamically set the new password in Redis Sentinel.  I can't restart Redis Sentinel.

I issue the following command to set the new password in Redis sentinel

           /usr/local/bin/redis-cli -p 26379 sentinel set mymaster auth-pass foo
 
However, the command shows up in the Redis Sentinel Console Log

           1:X 21 Feb 22:37:18.359 # +set master mymaster 10.1.112.60 6379 auth-pass foo

which presents a security risk as we have just displayed the new redis password in the console and subsequently in our logs. 

Question
How can I issue the set auth-pass in Redis Sentinel without the password showing up in the Redis Sentinel console, or
Is there a way I can set the password in Redis Sentinel and have it take effect without calling the 'sentinel set mymaster auth-pass' command.  e.g. CONFIG REWRITE in Redis Sentinel.

I have tried updating sentinel.conf with the new password directly and calling 'sentinel flushconfig', but that didn't cause the new password to take effect in Redis Sentinel.