FEATURE - Support Basic auth on backend

[Ronan-WeScale]

Hello,

My Mimir configuration use Basic auth config on Nginx to allow read/write. I'm not able to use Observatorium API with this configuration.

I read Observatorium can use TLS cert to authenticate but it's most easy for me to use Basic auth.

I understand my architecture isn't like Observatorium usage are think, my write path doesn't use Observatorium, I use it only for read path.

Did you program to implement basic auth support or not ?

Regards,