Limit login scope to just identifying users.
Review Request #7242 — Created April 23, 2015 and submitted
We have no need to post on behalf of a user or look at their history, so we
don't need to request those permissions.
Logged in and saw that slack only wanted to identify me.
Tool: PEP8 Style Checker Ignored Files: lib/routes.js Tool: Pyflakes Ignored Files: lib/routes.js