code: def generate_menu_alt():
      
      if not current_user.is_authenticated():
          return ('<li><a href="{0}"><i class="fa fa-fw fa-sign-in"></i> '
                  'Log in</a></li>'.format(url_for('login')))
      if db is not None and current_user.is_admin:
          edit_entry = (
              '<li><a href="{0}"><i class="fa fa-fw fa-users"></i> '
              'Manage users</a></li>'
              '<li><a href="{1}"><i class="fa fa-fw fa-cubes"></i> '
              'Permissions</a></li>'.format(
                  url_for('acp_users'), url_for('acp_users_permissions')))
      else:
          edit_entry = ''
      return """
      <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown"
              role="button" aria-expanded="false">
              <i class="fa fa-fw fa-user"></i>
              {0} [{1}] <span class="caret"></span></a>
          <ul class="dropdown-menu" role="menu">
              <li><a href="{3}"><i class="fa fa-fw fa-sliders"></i>
              Account</a></li>
              {2}
              <li><a href="{4}"><i class="fa fa-fw fa-sign-out"></i>
              Log out</a></li>
          </ul>
      </li>""".format(current_user.realname, current_user.username, edit_entry,
                      url_for('acp_account'), url_for('logout'))
docs: Generate ``menu_alt`` with log in/out links.
  
      :return: HTML fragment
      :rtype: str