FIX: 2FA prompt incorrectly displayed on admin login page.

app/views/users/admin_login.html.erb

@@ -7,10 +7,12 @@
       <%= @message %>
       <% if @error %><p><%= @error %></p><% end %>
 
-      <%=form_tag({}, method: :put) do %>
-        <%= label_tag(:second_factor_token, t('login.second_factor_description')) %>
-        <%= text_field_tag(:second_factor_token, nil, autofocus: true) %><br><br>
-        <%= submit_tag t('submit')%>
+      <% if @second_factor_required %>
+        <%=form_tag({}, method: :put) do %>
+          <%= label_tag(:second_factor_token, t('login.second_factor_description')) %>
+          <%= text_field_tag(:second_factor_token, nil, autofocus: true) %><br><br>
+          <%= submit_tag t('submit')%>
+        <% end %>
       <% end %>
     <% else %>
       <%=form_tag({}, method: :put) do %>

spec/controllers/users_controller_spec.rb

@@ -523,6 +523,21 @@ describe UsersController do
       end
     end
 
+    context 'when email is incorrect' do
+      render_views
+
+      it 'should return the right response' do
+        get :admin_login, params: { email: 'random' }
+
+        expect(response.status).to eq(200)
+
+        response_body = response.body
+
+        expect(response_body).to match(I18n.t("admin_login.errors.unknown_email_address"))
+        expect(response_body).to_not match(I18n.t("login.second_factor_description"))
+      end
+    end
+
     context 'logs in admin' do
       it 'does not log in admin with invalid token' do
         SiteSetting.sso_url = "https://www.example.com/sso"