Rest API with large data

Hello Friends,

I want to create power bi dashboard using Mongo DB, but I think right now Mongo DB conector is not avilable for power bi. 

So I have create Rest API and connect power bi using "Web Connector".  Now I need your suggestion , How can I handle (approx or more than 10 Million) data in Rest API. What is best way in Power Bi.

Regards,

Sandeep.