auth method works wrong for default username

[pelid]

Version: 4.2.2

Platform: Docker image python:3.10

Description: Can not connect to Redis with Sentinel and with protection by password.

>>> from redis import Sentinel
>>> 
>>> PASSWORD = 'some password'
>>> sentinel = Sentinel(
...     [('redis', 26379)],
...     sentinel_kwargs={'password': PASSWORD},
...     socket_timeout=0.1
... )
>>> sentinel.sentinel_masters()   # Check sentinel authentication works correctly
True
>>> master = sentinel.master_for('mymaster', socket_timeout=0.1)
>>> master.auth(PASSWORD)
<bound method Redis.execute_command of Redis<SentinelConnectionPool<service=mymaster(master)>>

Expects authentication to be done but got bound method instead. This behaviour does not correspond to docstring content:

redis/commands/core.py:372

def auth(self, password, username=None, **kwargs):
    """
    Authenticates the user. If you do not pass username, Redis will try to
    authenticate for the "default" user. If you do pass username, it will
    authenticate for the given user.
    For more information see https://redis.io/commands/auth
    """

Suppose it is a bug:

redis/commands/core.py:379

if username:
    return self.execute_command("AUTH", username, password, **kwargs)
return self.execute_command

Why return execute_command instead of calling it ?