////user.rb////
  def self.new_user
    generated_password = Devise.friendly_token.first(8)
    user = User.create!(:email => email, :firstname => firstname, :gender => gender, :password => generated_password)
  end

////bookingscontroller////
	def create
		@user = User.new_user(user_params)
		@user.save
    end

		private
		def user_params
			params.require(:user).permit(:email, :firstname, :gender, :password)
		end