Add username to StrictRedis connection

[Luferov]

Checklist

• Python version: 3.8.16
• Using hiredis or just Python parser: yes
• Using uvloop or just asyncio event loop: yes
• Does issue exists against the master branch of aredis? Yes

Steps to reproduce

import asyncio
from aredis import StrictRedis

async def example():
    client = StrictRedis(host='127.0.0.1', port=6379, db=0, username='user', password='password')
    await client.flushdb()
    await client.set('foo', 1)
    assert await client.exists('foo') is True
    await client.incr('foo', 100)

    assert int(await client.get('foo')) == 101
    await client.expire('foo', 1)
    await asyncio.sleep(0.1)
    await client.ttl('foo')
    await asyncio.sleep(1)
    assert not await client.exists('foo')

loop = asyncio.get_event_loop()
loop.run_until_complete(example())

Expected behavior

All ok.

Actual behavior

Traceback (most recent call last):
  File "/Users/victor/PycharmProjects/aredis/aredis/connection.py", line 415, in connect
    await self._connect()
  File "/Users/victor/PycharmProjects/aredis/aredis/connection.py", line 620, in _connect
    await self.on_connect()
  File "/Users/victor/PycharmProjects/aredis/aredis/connection.py", line 439, in on_connect
    if nativestr(await self.read_response()) != 'OK':
  File "/Users/victor/PycharmProjects/aredis/aredis/connection.py", line 457, in read_response
    raise response
aredis.exceptions.ResponseError: AUTH <password> called without any password configured for the default user. Are you sure your configuration is correct?
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/Users/victor/PycharmProjects/aredis/aredis/client.py", line 155, in execute_command
    await connection.send_command(*args)
  File "/Users/victor/PycharmProjects/aredis/aredis/connection.py", line 488, in send_command
    await self.connect()
  File "/Users/victor/PycharmProjects/aredis/aredis/connection.py", line 419, in connect
    raise ConnectionError()
aredis.exceptions.ConnectionError
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/Users/victor/PycharmProjects/aredis/aredis/connection.py", line 415, in connect
    await self._connect()
  File "/Users/victor/PycharmProjects/aredis/aredis/connection.py", line 620, in _connect
    await self.on_connect()
  File "/Users/victor/PycharmProjects/aredis/aredis/connection.py", line 439, in on_connect
    if nativestr(await self.read_response()) != 'OK':
  File "/Users/victor/PycharmProjects/aredis/aredis/connection.py", line 457, in read_response
    raise response
aredis.exceptions.ResponseError: AUTH <password> called without any password configured for the default user. Are you sure your configuration is correct?
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/Applications/PyCharm.app/Contents/plugins/python/helpers/pydev/pydevconsole.py", line 364, in runcode
    coro = func()
  File "<input>", line 21, in <module>
  File "/Users/victor/.pyenv/versions/3.8.16/lib/python3.8/asyncio/base_events.py", line 616, in run_until_complete
    return future.result()
  File "<input>", line 8, in example
  File "/Users/victor/PycharmProjects/aredis/aredis/commands/server.py", line 232, in flushdb
    return await self.execute_command('FLUSHDB')
  File "/Users/victor/PycharmProjects/aredis/aredis/client.py", line 165, in execute_command
    await connection.send_command(*args)
  File "/Users/victor/PycharmProjects/aredis/aredis/connection.py", line 488, in send_command
    await self.connect()
  File "/Users/victor/PycharmProjects/aredis/aredis/connection.py", line 419, in connect
    raise ConnectionError()
aredis.exceptions.ConnectionError