Netflow for GL.INET? softflowd?

After some research, openwrt should allow for softflowd, however there is absolutely no documentation in regards to how to acquire netflow capabilities. softflowd should do the job, however its not clear on how it is to be configured. Researching bared no fruits. Anyone with experience ?

Using an GL-AR750.

Thank you in advance.

A good article is here Install and verify softflowd for Netflow on OpenWrt