app/views/devise/sessions/new.html.erb
<% content_for(:page_title, 'Sign in') %>
<%= render 'shared/auth_form', title: 'Sign in' do %>
<%= form_for(resource, as: resource_name, url: session_path(resource_name)) do |f| %>
<div class="field">
<div class="control">
<%= f.email_field :email, class: :input, placeholder: :email, autofocus: true %>
</div>
</div>
<div class="field">
<div class="control">
<%= f.password_field :password, class: :input, placeholder: :password, autocomplete: "off" %>
</div>
</div>
<% if devise_mapping.rememberable? %>
<div class="field">
<div class="control">
<%= f.label :remember_me, class: :checkbox do %>
<%= f.check_box :remember_me %>
Remember me
<% end %>
</div>
</div>
<% end %>
<div class="field">
<div class="control">
<%= f.submit "Sign in", class: 'button is-primary' %>
</div>
</div>
<% end %>
<% end %>