More documents will follow.
Yes, after doing az login (see target azure-do-login) the credential will be stored in ~/.azure
This is learnt from Makefile.gce, please let me know if there is a preferable way.
Update to the version I used for 11.4-RELEASE
It turns out that there is actually no az login required to upload an image
or generate an access URL. Setting the access token in the config file is
enough, thus simply remove the azure-do-login target.
I think this version is good for review. The doc about how to use Microsoft
Partner Center to publish the image (VM offer) will be posted to here soon.