APIs Subsequent calls

Hi, amazing people of Bubble! I need your help.

Here I have a RAML Rest API. I was able to connect all the calls successfully but how do I build a workflow with Subsequent calls in Bubble. The goal is to enroll a user in an external service via APIS Calls.

The first call is a GET returning a trackingToken to be used with each user. And another call is a POST returning a unique customerToken for the same user. Hopefully I was able to explain this the best way possible.

Thank you in advance.