controller.rb

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

  def create
    @user = User.new
    @user.first_name = params[:first_name]
    @user.last_name = params[:last_name]
    @user.phone = params[:phone]
    @user.admin = params[:admin]
    @user.owner = params[:owner]
    @user.save!

    redirect_to contacts_index_path
  end

  def index
    @users = User.all
  end


end

index.html.erb

<h1>User Manager</h1>
<p>Listing all users </p>


<table>
  <tr>
    <td> First name </td>
    <td> Last name </td>
    <td> Phone </td>
    <td> Sex </td>
    <td> Owner </td>
    <td> Admin </td>
  </tr>

  <tr>
    <% @users.all do |user| %>
        <td> <%= user.first_name %> </td>
        <td> <%= user.last_name %> </td>
        <td> <%= user.phone %> </td>
        <td> <%= user.sex %> </td>
        <td> <%= user.owner %> </td>
        <td> <%= user.admins %> </td>
    <% end %>
  </tr>
</table>