inconsistent behavior when calling `./ddctl` with incorrect credentials

[weirdbricks]

Hello,

Thank you very much for your work on ddctl.
I'm a first time user of ddctl - while setting it up for the first time, I tried the following:

./ddctl downtime list all

and got:

Traceback (most recent call last):
  File "./ddctl", line 45, in <module>
    downtime.get_downtimes(ALL_DOWNTIMES=args['all'])
  File "/home/lamprosc/ddctl/brain/downtime.py", line 57, in get_downtimes
    .format(scope=downtime['scope'],
TypeError: string indices must be integers

Trying to get the tags also gave me an unexpected message:

./ddctl query tags --all
Unable to get all tags due to: 'tags'

Trying to mute a host gave me a clue on what was wrong :) :

./ddctl mute nukeitfromorbit
NOTE: Invalid API key or Application key.

After I fixed my credentials all errors went away. I'm not sure how much work would it be but would it be possible to make the error messages more consistent ? The NOTE: Invalid API key or Application key. makes perfect sense.

Thanks!