API Authentication Delete User

Hello there. I added users using API. But I could not delete it. Can you give information about how to use it?

Use Api: <Remove><User><Username>10597586696</Username><Name></Name></User></Remove>

Incoming reply:

<?xml version="1.0" encoding="UTF-8"?>
<Response APIVersion="1800.2" IPS_CAT_VER="1">
<Login>
<status>Authentication Successful</status>
</Login>
<User transactionid="">
<Status code="200">Configuration applied successfully.</Status>
</User>
</Response>

Thanks.