<odoo>
  <data>
    <template id="custom_sign_in" customize_show="True" inherit_id="website.layout" name="Custom Sign In">
      <xpath expr="//ul[@id='top_menu']" position="replace">
        <ul class="nav navbar-nav ml-auto text-right" id="top_menu">
          <li class="nav-item" t-if="website.user_id != user_id">
            <a class="nav-link" role="menuitem" t-attf-href="/my/orders">
              <span>Sale Order</span>
            </a>
          </li>
          <li class="nav-item divider"></li>
          <li class="nav-item dropdown" t-if="website.user_id != user_id">
            <a href="#" class="nav-link dropdown-toggle" data-toggle="dropdown">
              <b>
                <span t-esc="user_id.name"/>
              </b>
            </a>
            <div class="dropdown-menu js_usermenu" role="menu">
              <a href="/my/home" role="menuitem" class="dropdown-item">My Account</a>
              <a id="o_logout" class="dropdown-item" role="menuitem" href="/web/session/logout?redirect=/">Logout</a>
            </div>
          </li>
          <li class="nav-item" t-if="website.user_id == user_id">
            <a class="nav-link" href="/web/login">
              <b>Sign in</b>
            </a>
          </li>
        </ul>
      </xpath>
    </template>
  </data>
</odoo>