designate python client is not showing proper help message when authentication environment variable are missing

[Pradeep Kumar Singh]

pksingh@myenv:~/designate$ designate server-list
ERROR: Expecting to find username or userId in passwordCredentials - the server could not comply with the request since it is either malformed or otherwise incorrect. The client is assumed to be in error. (HTTP 400) (Request-ID: req-d8925e1b-c04a-4e30-a507-e83773fb6bf4)
pksingh@myenv:~/designate$

Here env variable OS_USERNAME is missing, and designate is sending the request to keystone withot proper validation of environemnet variables, i think it should check all these variables before sending the request.

When no environemnt variable is set, i get following message
pksingh@myenv:~/designate$ designate server-list
ERROR: No endpoint was found. Missing credentials?

I think this should generate some help message why error is comming and how can user correct it.
It should show what parameters need to be passed or set into environment.

[Pradeep Kumar Singh (pradeep-singh-u)]

Hi Federico Ceratto,

I think its better to ask before assigning the bug to yourself.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Federico Ceratto (<email address hidden>) on branch: master
Review: https://review.openstack.org/199067
Reason: As discussed, there seems to be no way to reliably check for options. Changes in Keystone would break the CLI tool.