Passing username to Redis in decorators

[lainiwa]

Hello!
What is the recommended way of passing a username to the @cached decorator with Redis backend?
Currently the decorator takes the password, but doesn't allow the username.
Is it intentionally designed that way?

Things I tried:

@cached(
    cache=Cache.REDIS,
    username=...  # <-- NOT ALLOWED
    password=...
)
async def f(n):

and

import redis.asyncio as redis

@cached(
    cache=Cache.REDIS,
    client=redis.Redis(username=..., password=...)  # <-- NOT ALLOWED
)
async def f(n):

[Dreamsorcerer]

v1 will just accept the cache object itself, instead of having all those parameters.

See #609