code: def add_checkin(options={})
        response = connection.post do |req|
          req.url "checkins/add", options
        end
        return_error_or_body(response, response.body.response.checkin)
      end
docs: Checkin on behalf of the user.
  
   @param [Hash] options
   @option options String :venueId - Venue for the checkin.
   @option options String :venue - For venueless checkins (name or other identifier)
   @option options String :shout - Message to be included with the checkin.
   @option options String :broadcast - Required, one or more of private,public,facebook,twitter.  Comma-separated.
   @option options String :ll - Latitude and longitude in format LAT,LON
   @option options Integer :llAcc - Accuracy of the lat/lon in meters.
   @option options Integer :alt - Altitude in meters
   @option options Integer :altAcc - Accuracy of the altitude in meters