Figure out how to list tags from docker registry about kubex HOT 1 OPEN

Ok, so tested this approach against ACR

1. make request for https://nrkazuredockerregistry.azurecr.io/v2/tv-series-web/tags/list
2. read content of Www-Authenticate header
   Bearer realm="https://nrkazuredockerregistry.azurecr.io/oauth2/token",service="nrkazuredockerregistry.azurecr.io",scope="repository:tv-series-web:pull"
3. Make new request at https://nrkazuredockerregistry.azurecr.io/oauth2/token?service=nrkazuredockerregistry.azurecr.io&scope=repository:tv-series-web:pull
   Add basic auth Authorization=Basic base64(username:password)
4. Use token returned to make new request for https://nrkazuredockerregistry.azurecr.io/v2/tv-series-web/tags/list
   with Authorization=Bearer <token>
5. Voilá!

On the other hand... if you already have the basic auth just use that right away in the first request...

from kubex.