# Usage => User.joined_between(10.days.ago, Date.today).count
scope :joined_between, lambda { |startdate, enddate| where("users.created_at > ? AND users.created_at < ?", startdate, enddate) }

# Usage => users[:display_name].call(current_user)
users = {
  display_name: lambda { |user| return user.first_name.capitalize + ' ' + user.last_name.capitalize }
}