Is there a way from express to see if an LH accountId exists

There is a method in FormUtil called testObject that you pass (session, "User", "accountNameYouWantToCheck")

It will return the string "true" if found.

There also is a method testUser, which does the same thing, you just pass in (session, "accountNameYouWantToCheck")

Here is an express example of testUser:

<defun name="userExistsInWaveset">

   <defarg name="generatedAccountID"/>

   <eq>

    <s>true</s>

    <invoke name="testUser" class="com.waveset.ui.FormUtil">

      <ref>:display.session</ref>

      <ref>generatedAccountID</ref>

    </invoke>

  </eq>

</defun>