Document how to use a redis instance that needs a password

[dramamask]

Describe the feature request

II'd love to see the following info added to the documentation.

To use a redis instance that needs a password, use the following redis url:

redis://default:your_password@redis:6379

For redis v5, you have to use default as the username. Redis v6 introduced usernames, so you just use whatever username you have set.

Background

No response

Solution suggestions

No response

[pransh15]

Hey @dramamask 👋

Thanks for submitting this feature request. Someone from the team will be on it soon! 😄