Need to run "gdcp list" not just "gdcp" to see the URL for the autorization code

[jfwalsh]

The setup text says this:

"Once you've created ~/.gdcp/client_secrets.json, run gdcp again to authorize access to your Google Drive. You should see something like ..."

I found that running gdcp without any parameters was not enough, I needed to add "list" before the URL was displayed. (Possibly list was the default operation in the past?)