Here's what I have:
<session name="es_load" probability="100" type="ts_http">
<request subst="true">
<http url='/access.log' version='1.0'
contents='{"username"="rsss","password"="pass"}'
content_type='application/json' method='POST'>
</http>
</request>
</session>
I don't see this even getting posted on the backend.
Switched to locust.io and couldn't be happier!