Adds access token scope to CLI
Adds access token scope to CLI

This simply adds a clarifying detail, that the access token only needs the `user:email` scope for setting up depot with GitHub authentication.

Signed-off-by: Jonathan Freeman <fbf1f181c4585ae5a22598472352c8fe63e169cd@gmail.com>
georgemarshall/habitat,georgemarshall/habitat,habitat-sh/habitat,habitat-sh/habitat,rsertelon/habitat,nathenharvey/habitat,georgemarshall/habitat,habitat-sh/habitat,georgemarshall/habitat,georgemarshall/habitat,rsertelon/habitat,georgemarshall/habitat,nathenharvey/habitat,georgemarshall/habitat,habitat-sh/habitat,habitat-sh/habitat,rsertelon/habitat,habitat-sh/habitat,rsertelon/habitat,habitat-sh/habitat,rsertelon/habitat,rsertelon/habitat,habitat-sh/habitat,georgemarshall/habitat,nathenharvey/habitat,nathenharvey/habitat,rsertelon/habitat,nathenharvey/habitat,nathenharvey/habitat