simple_controller.rb

class UsersController < ApplicationController
  def create
    @user = User.new(user_params)
    if @user.save
      flash[:success] = "Welcome to Monchitos. Hope you enjoy it!"
      redirect_to posts_path
    else
      flash[:error] = "Sorry your registration could not be completed"
      render :new
    end
  end

  private

  def user_params
    params.require(:user).permit(:email, :name, :user_name)
  end
end