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Description of problem:

When I open 'Register system' dialog
   and fill 'Login' field
   and let 'Password' field empty
   and click 'Register'

Then a raw message 

    'Error: /usr/lib64/python2.7/getpass.py:83: GetPassWarning: Can not control echo on the terminal. passwd = fallback_getpass(prompt, stream) Warning: Password input may be echoed. Password: Registering to: subscription.rhsm.stage.redhat.com:443/subscription'

   appears.

Version-Release number of selected component (if applicable):

   [root@jstavel-rhel7-latest-server ~]# rpm -qa | grep cockpit
   cockpit-bridge-138-9.el7.x86_64
   cockpit-system-138-9.el7.noarch
   cockpit-138-9.el7.x86_64
   cockpit-ws-138-9.el7.x86_64


Actual results:

Raw result with python related info.

Expected results:

Something better from customer's perspective.

Created attachment 1333181 [details]
a screenshot of a raw error message

I think that this bug is fixed by existing PR (not merged yet). I'm adding link to this PR.

Created attachment 1357599 [details]
Better error message, when no password is provided.

Created attachment 1388766 [details]
Error: Missing username/password

Moving bug to verified .

Proper error message is now thrown to the user

[root@bkr-hv03-guest18 ~]# rpm -qa | grep cockpit
cockpit-160-2.el7.x86_64
cockpit-bridge-160-2.el7.x86_64
subscription-manager-cockpit-1.20.10-1.el7.noarch
cockpit-system-160-2.el7.noarch
cockpit-ws-160-2.el7.x86_64

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:0681