[P1] Analytics Login event is empty

[joelcloralt]

When someone logs in with email, the properties of the tracking event is empty. That's why we are seeing the bot on slack posting things like:
SegmentBOT [12:03 AM] at 2015-09-05T07:03:38.895Z

The event name should appear before the "at" as it does for all other events

[codelion]

It seems like at the moment there is no track event generated when someone logs in via email, all we have is an identify event - https://github.com/InstaJobs/webapp/blob/master/app/controllers/home_controller.rb#L184-L188

I am a bit confused on how we have integrated segment. If we do not call identify before calling track (like we do for FB and LinkedIn logins) we loose the information about the user and it is treated as an anonymous user by segment - https://segment.com/docs/spec/identify/

CC: @avidyut1