<%= link_to root_path do %>

<% end %>
instance <%= @instance.name %>
<%= render partial: "zone_img", locals: { zone: @instance.zone, alt: @instance.zone, title: @instance.zone.upcase_first } %>
password: ???
<%= form_with url: authenticate_to_instance_path do |form| %>
<%= form.text_field :password, placeholder: "enter password..." %>
<%= form.hidden_field :instance, value: @instance.public_id %>
<%= form.submit "submit" %>
<% end %>