vpnControl/templates/admin_box.html

      <form action="/admin" method="post">
        <div class="form-group row">
          <div class="col-sm-12">
            <button type="submit" class="btn btn-primary">tokens generieren</button>
          </div>
        </div>
        <div class="form-group row">
          <div class="col-sm-12">
            <textarea class="form-control" id="tokens" name="tokens" placeholder="noch keine vorhanden">{{ range .Custom }}{{ . }}{{ end }}</textarea>
          </div>
        </div>
      </form>