Api interface design

Good evening elixirs (don’t know if you have a special name:)),
For my first proyect, i am going to do an app/library/module for interface with this api.
I think about 3 possible ways (i had draw a beautiful images but i not able to show here so i will put a link):
..* App design:
Create an entire app wich generates a new pool for every token and manage all of them with the top server
..Module 1
Generate a new pool for every process but it doesn’t know about the others so it isn’t able to control the rate limit
..Module 2:
Just a simple call to the api, no rate control and need to pass the token for every request

I am here to learning so, tell what you want:)
pd: apologize my english