snapcraft list-keys prints no message when there are no keys

Metadata

Project: snapcraft
Number: #1622037
Type: issue
State: open
Author: ~elopio
Labels: —
Created: 2016-09-09 22:49:45.756078+00:00
Updated: 2016-10-25 22:50:34.059635+00:00
Closed: —

Current evaluation

No evaluation has been recorded for this issue yet.

Issue body

When I run snapcraft list-keys without keys associated, I get: ⟫ snapcraft list-keys Name SHA3-384 fingerprint ⟫ It would be better to print a message saying that there are no keys. Maybe even some tips about how to add some.

Evaluation history

No evaluation history available.