Update regarding the strange gathering of ants on my lufa plant

This is a follow up to my previous post regarding strange gathering of ants on my lufa plant https://sh.itjust.works/post/57881489

I managed to identify a spot that ants gathering around and placed it under digital microscope.

this bump is what is attracting ants but I still don't know what it is or whether its the plant that produce it or the ants causing it.

Edit: Looks like I am not the only one

https://www.reddit.com/r/vegetablegardening/comments/1eeixn2/why_are_these_ants_always_on_my_luffa_im_assuming/

https://www.reddit.com/r/gardening/comments/16nrve7/ants_on_luffa_plant_pls_help/

Seems harmless. Good to know