How to auto-post content to Instagram for users on the site?

Question

API

Hello! In the company where I work, we have developed a service (I will not go into a detailed description), the service has more than several hundred sites, all on the same platform. Each site has users who enter their site. The task is to make auto-posting for them, that is, the user adds news in the admin panel of his site and it is automatically added as a publication to the social network (you need Instagram, everything is easy with VK).
Now I need to think about how to get my Instagram account data in order to add posts, and I need to give the opportunity for each site to have its own profile, or rather attach its account to its site.
1 problem is in the authorization of the Instagram account and saving behind the site (more precisely, what and what account data to store in the database). Either the user on his site in the admin panel authorizes his account on Instagram and I save the necessary data in the database for further work, or he enters the login and password of his account, and I save it in the database and then using the https://github.com library /mgp25/Instagram-API auto- post to instagram when it adds news to the site. But does this library allow you to work with multiple instagram accounts or just one.
All the same, I need a solution where different accounts will go through one script and different materials will be added. Project backend on laravel, mysql base, nginx server
I hope for reasonable answers and solution to the problem.
Thank you!

Answer 1

What's the problem? For each site, call the mgp25 methods with a different login/password. You can't do it without a username and password.
I have three insta accounts spinning, no problem