+<notextile>
+<pre><code>~/arvados/services/api$ <span class="userinput">RAILS_ENV=production bundle exec rails console</span>
+irb(main):001:0> <span class="userinput">Thread.current[:user] = User.all.select(&:identity_url).last</span>
+irb(main):002:0> <span class="userinput">Thread.current[:user].is_admin = true</span>
+irb(main):003:0> <span class="userinput">Thread.current[:user].update_attributes is_admin: true, is_active: true</span>
+irb(main):004:0> <span class="userinput">User.where(is_admin: true).collect &:email</span>
+=> ["root", "<b>your_address@example.com</b>"]
+</code></pre></notextile>