app/views/devise/confirmations/show.html.erb
<div class="container">
<div class="row justify-content-md-center">
<div class="col-md-6 mt-2rem mb-2rem">
<h2 class="text-center mt-2 mb-2rem">
You're almost done!
</h2>
<h3 class="text-center mb-2rem">
Now create a password to securely access your account
</h3>
<%= form_for(resource, as: resource_name, url: confirm_path) do |f| %>
<%= devise_error_messages! %>
<% if params[:invited] %>
<%= f.hidden_field :invited, value: true %>
<%= f.hidden_field :group_id, value: params[:group_id] %>
<% end %>
<div class="form-group">
<%= f.label :password %>
<% if @minimum_password_length %>
<small>(<%= @minimum_password_length %> characters minimum)</small>
<% end %><br />
<%= f.password_field :password, autocomplete: "off",
class: "form-control" %>
</div>
<div class="form-group mb-2rem">
<%= f.label :password_confirmation %><br />
<%= f.password_field :password_confirmation, autocomplete: "off",
class: "form-control" %>
</div>
<%= f.text_field :confirmation_token, hidden: true %>
<div class="form-group mb-4">
<%= f.submit "Confirm account",
class: "btn btn-primary btn-block btn-lg btn-3d" %>
</div>
<% end %>
</div>
</div>
</div>