message: Add sidebar-network to cardstack-authenticator-launcher template
diff: <div class="cardstack-rail-item cardstack-non-interactive">
  <div class="cardstack-network-icon"
  style={{css-url "background-image" network.iconUrl}} >{{network.name}}</div>
  +
  + {{#if session.user}}
  + {{cardstack-content content=session.user format="sidebar-network"}}
  + {{/if}}
  </div>
  {{/if}}
  {{#if session.user}}
  