I ran go get -u github.com/dropbox/dbxcli and then ./dbxcli du. This is the auth url I'm given: https://www.dropbox.com/1/oauth2/authorize?client_id=mvhz183vwqibe7q&response_type=code&state=state

and this is what I get when I visit:

Am I doing something wrong here?