Web service call to retrieve token and use another webservice call to send update

Content

I need to take a web services class but I have a requirement NOW that I need some help with. Within a Function I'm supposed to make an API Call to an external system where I have a login. With this call (POST) I'm supposed to have a token returned. I tested this with POSTMAN and it works. After this token is assigned, I'm assuming within the same Function I can initiate another web service call and use this token I just received from the initial call to be able to POST the data I'm sending from CX Sales. So