This function clears a user's NGINX cache
A list of users whose cache you want to clear.
Note:
If you do not pass this parameter, this function clears the cache for all users.
HTTP Request was successful.
whmapi1 --output=jsonpretty \ nginxmanager_clear_cache
{"metadata": {"command": "nginxmanager_clear_cache","reason": "OK","result": 1,"version": 1}}