how could I use this addon "LastPass Report Collection" if my Splunk can only access the internet through a proxy ??
I cannot find any fields for the proxy settings in the configuration menu of this Addon.
how could I make this one work without rebuilding the whole addon?
You can add the proxy configuration in splunk-launch.conf and also add NO_PROXY setttings as well.
Refer https://answers.splunk.com/answers/555493/how-to-configure-exceptions-to-proxy-config-in-spl.html for more details.
Most of the code will honor the proxy setting at OS level .