What is the best way to make a personal account for a VKontakte group?

Question

MySQL

Have a nice day, everyone!
Friends, I fell into a stupor - it is necessary to make "personal accounts" for a VKontakte group of about 4,000 people. What you need - a person enters the site using his VK account, where he can see a list of his orders or declare payment. Admins can view, edit, etc. this data.
Now there is LAMP on Digital Ocean, but what's next?
I see it like this - a table with all users, a table with privileges, a table with data. Some script that will regularly update the list of users.
Which VK authorization method is better for this purpose (there are a lot of them)?
What is the best place to start? Maybe someone did something similar before or came across a description?
I understand that the question is quite voluminous and stupid, I just haven’t done anything like this before.
Thanks for understanding!

Answer 1

Django + django-social-auth

Answer 2

No time to explain (c)
https://codepen.io/codyhouse/pen/FdkEf
and everything else on request "vertical timeline".