bookstore/app/views/users/index.html.erb

<div class='container'>
  <% @users.each do |user| %>
    <div class='row'>
      <div class='col s3'>
        <%= user.email %>
      </div>
      <div class='col s2'>
        <%= user.role %>
      </div>
      <div class='col s2'>
        <%= user.status %>
      </div>
      <div class='col s2'>
        <%= link_to 'Delete', user, method: :delete, class: "btn" %>
      </div>
      <div class='col s2'>
        <%= link_to 'Block', "/user/#{user.id}/block", method: :post, class: "btn" %>
      </div>
    </div>
  <% end %>
</div>