///Booking Controller///
    @user = User.generate_random_password(params[:user[email]], params[:user[firstname]], params[:user[gender]])
    @user.save

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