when I am trying to run snapcraft push xxx.snap, I got the error message like Received 403:'{"error_list": [{"message": "Developer has not signed agreement.", "code": "user-not-ready"}]}' At first I thought maybe I need to go to sign developer code of launchpad, but in IRC channel I got I need to go to https://myapps.developer.ubuntu.com/dev/agreements/new/ in case of misunderstanding, I suggest to add this link in error message and let user know what they should do next step.