Throws AuthenticationError despite providing password in settings.

[shrutimansinghka]

CACHES = {
    "default": {
        "BACKEND": "redis_cache.RedisCache",
        "LOCATION": [
           env('CACHE_MASTER_URL'),
            env('CACHE_SLAVE_URL'),
        ],
        "OPTIONS": {
            'DB': 1,
            "PASSWORD": env('CACHE_PASSWORD'),
            'MASTER_CACHE': env('CACHE_MASTER_URL')
        }
    }
}

Stack Trace:

----> 1 cache.set("test-1", "test-val", 3060)

~/Documents/workspace/michan_api/app-code/michan/lib/python3.6/site-packages/redis_cache/backends/base.py in wrapped(self, key, *args, **kwargs)
     28             key = self.make_key(key, version=version)
     29             client = self.get_client(key, write=write)
---> 30             return method(self, client, key, *args, **kwargs)
     31
     32         return wrapped

~/Documents/workspace/michan_api/app-code/michan/lib/python3.6/site-packages/redis_cache/backends/base.py in set(self, client, key, value, timeout)
    279         """
    280         timeout = self.get_timeout(timeout)
--> 281         result = self._set(client, key, self.prep_value(value), timeout, _add_only=False)
    282         return result
    283

~/Documents/workspace/michan_api/app-code/michan/lib/python3.6/site-packages/redis_cache/backends/base.py in _set(self, client, key, value, timeout, _add_only)
    272         elif timeout == 0:
    273             return client.expire(key, 0)
--> 274         return client.set(key, value, nx=_add_only, ex=timeout)
    275
    276     @get_client(write=True)

~/Documents/workspace/michan_api/app-code/michan/lib/python3.6/site-packages/redis/client.py in set(self, name, value, ex, px, nx, xx)
   1764         if xx:
   1765             pieces.append('XX')
-> 1766         return self.execute_command('SET', *pieces)
   1767
   1768     def __setitem__(self, name, value):

~/Documents/workspace/michan_api/app-code/michan/lib/python3.6/site-packages/redis/client.py in execute_command(self, *args, **options)
    873         pool = self.connection_pool
    874         command_name = args[0]
--> 875         conn = self.connection or pool.get_connection(command_name, **options)
    876         try:
    877             conn.send_command(*args)

~/Documents/workspace/michan_api/app-code/michan/lib/python3.6/site-packages/redis/connection.py in get_connection(self, command_name, *keys, **options)
   1183             try:
   1184                 # ensure this connection is connected to Redis
-> 1185                 connection.connect()
   1186                 # connections that the pool provides should be ready to send
   1187                 # a command. if not, the connection was either returned to the

~/Documents/workspace/michan_api/app-code/michan/lib/python3.6/site-packages/redis/connection.py in connect(self)
    559         self._sock = sock
    560         try:
--> 561             self.on_connect()
    562         except RedisError:
    563             # clean up after any error in on_connect

~/Documents/workspace/michan_api/app-code/michan/lib/python3.6/site-packages/redis/connection.py in on_connect(self)
    656         if self.db:
    657             self.send_command('SELECT', self.db)
--> 658             if nativestr(self.read_response()) != 'OK':
    659                 raise ConnectionError('Invalid Database')
    660

~/Documents/workspace/michan_api/app-code/michan/lib/python3.6/site-packages/redis/connection.py in read_response(self)
    732         "Read the response from a previously sent command"
    733         try:
--> 734             response = self._parser.read_response()
    735         except socket.timeout:
    736             self.disconnect()

~/Documents/workspace/michan_api/app-code/michan/lib/python3.6/site-packages/redis/connection.py in read_response(self)
    331             # is notified
    332             if isinstance(error, ConnectionError):
--> 333                 raise error
    334             # otherwise, we're dealing with a ResponseError that might belong
    335             # inside a pipeline response. the connection's read_response()

AuthenticationError: Authentication required.

[bnmounir]

I had the same issue. The response was coming from the Redis server, running version 6.2.5.
The error is due to the username not being passed in from django-redis-cache to redis-py.