app/controllers/registrations_controller.rb


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class RegistrationsController < ApplicationController
  def new
    @user = User.new
  end

  def create
    @user = User.new(user_params)
    if @user.save
      start_new_session_for @user
      redirect_to root_path, notice: "Successfully signed up!"
    else
      render :new
    end
  end

  private

  def user_params
    params.require(:user).permit(:email_address, :password, :password_confirmation)
  end
end