Background of the problem: I am using Redis backend for Django cache and getting this error on Django admin page login:

redis.exceptions.ResponseError: WRONGPASS invalid username-password pair or user is disabled.

and my redis connection URL was set to

redis://SECRETPWD@redis-host:6379

The solution of the problem: set redis connection URL to

redis://default:SECRETPWD@redis-host:6379

(https://dba.stackexchange.com/a/306271)