User Sign-In
<%= form_for(resource, as: resource_name, url: session_path(resource_name), html: { role: "form" }) do |f| %> <%= devise_error_messages! %>
<%= f.email_field :email, required: true, autofocus: true, class: "form-control", :placeholder => "Email" %>
<%= f.password_field :password, required: true, autocomplete: "off", class: "form-control", :placeholder => "Password" %>
<%= f.check_box :remember_me, as: :boolean, inline_label: 'Remember me' if devise_mapping.rememberable? %>
<%= f.submit "Sign-In", class: "btn btn-primary" %>
<%= render "devise/shared/links" %>
<% end %>