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[Cyril Roelandt <1599187@xxxxxxxxxxxxxxxxxx>]

** Changed in: glance
       Status: In Progress => Won't Fix

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https://bugs.launchpad.net/bugs/1599187

Title:
  glance-replicator size: Handle no slavetoken case better

Status in Glance:
  Won't Fix

Bug description:
  I think `glance-replicator size` should display a more informative
  error message if no token was provided.

  Currently it doesn't check for the no token case and then fails with
  an HTTP 401 error:

  ```
  $ glance-replicator size az3:9292
  2016-07-04 09:58:58.675 31732 CRITICAL glance [-] HTTPUnauthorized: 401 Unauthorized

  This server could not verify that you are authorized to access the
  document you requested. Either you supplied the wrong credentials
  (e.g., bad password), or your browser does>

  2016-07-04 09:58:58.675 31732 ERROR glance Traceback (most recent call last):
  ...
  2016-07-04 09:58:58.675 31732 ERROR glance   File "/Users/marca/dev/git-repos/glance/glance/cmd/replicator.py", line 166, in _http_request
  2016-07-04 09:58:58.675 31732 ERROR glance     explanation=response.read())
  2016-07-04 09:58:58.675 31732 ERROR glance HTTPUnauthorized: 401 Unauthorized
  2016-07-04 09:58:58.675 31732 ERROR glance
  2016-07-04 09:58:58.675 31732 ERROR glance This server could not verify that you are authorized to access the document you requested. Either you supplied the wrong credentials>
  2016-07-04 09:58:58.675 31732 ERROR glance
  2016-07-04 09:58:58.675 31732 ERROR glance
  2016-07-04 09:58:58.675 31732 ERROR glance
  ```

  I think it would be more user-friendly to display a specific error
  message saying that the `slavetoken` is required:

  ```
  $ glance-replicator size az3:9292
  2016-07-05 07:36:48.365 69704 CRITICAL glance [-] MissingCredentialError: Missing required credential: slavetoken
  ...
  ```

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