def checkins(options={})
      @foursquare.get("users/#{id}/checkins", options)["checkins"]["items"].map do |item|
        Foursquare::Checkin.new(@foursquare, item)
      end
    end
def checkins(options={})
      @foursquare.get("users/#{id}/checkins", options)["checkins"]["items"].map do |item|
        Foursquare::Checkin.new(@foursquare, item)
      end
    end
https://developer.foursquare.com/docs/users/checkins.html
 https://developer.foursquare.com/docs/explore.html#req=users/self/checkins