C and C++ Xcode (Mac) integrating code

I have a Xcode (Mac) shell that needs code to get to an application. The application is to integrate with websites to download data and to upload data. We are to to a statistical analysis on information (we have that analytical code done inhouse) and and you are helping us to get that information. When we have that information we need to make decisions and post them. The information we are to do analysis on is traded stocks. We are to trade stocks when the analysis are done. The shell is built in Xcode. You are to do an integration with [login to view URL] go get information and to post trades through REST API. Our next step, when we are done with this first part and it works great, is to do an [login to view URL] integration to do the data and trade. An option is to do part of the integration through [login to view URL] You will have our framework and links to GitHub example code to integrate.