Mt5 web app license system needed

hey guys, im looking for an auto mt5 license system through a web app i have already, i simply want it so a unique license key is generated for memebers, they input this onto the EA input and then it checks if its valid.

active license per user capped at 5.

i already have an mt5 coder and dec team for the app so i dont know if youd prefer to intergrate onto the webapp yourself or simply provide the code and doc so my team can do it.

one more thing.. ive had systems like this before and im unsure if its when the server gets multiple requests at the same time but sometimes the license can fail when it shouldnt so in the past ive has a fail safe coded into the EA part of the code.

for example; if EA license fails, check once an hour for 4 hours.

if license is successfull, ea will then just check every 30 days from the date/time the ea is applied to chart?

thank you