How to correctly implement the network part of the application on a mobile device?

Question

Mobile development

Good day. I need to write a program that will link 2 social network accounts. For example, Facebook and Vkontakte, but the problem is that I don’t know how to implement it correctly, since there is api for both mobile applications and websites. What should an app be able to do? The user must log in and register by phone number, after which he can link the accounts and after, if the user enters the program, it must display a list of previously linked accounts.
So the crux of the matter is:What is the best way to implement this solution method, let the site (server) store all the data, use the Facebook and Vkontakte api for web communication, and then only process this data from a mobile device, or not use the server at all, but take the api for a mobile device? Which method will be more efficient? Or how else can such a system be implemented?

Answer 1

Use the official SDKs and third-party libraries for such tasks, as a rule they already have all the methods built in and they provide you with a more abstract interface for working with the social networks API.