How to make automatic posting of photos from vk group to instagram?

Question

Automation

What services do you know? Are there any free solutions like ready made python library?
Important: you need auto-posting not from my VKontakte group, but from someone else's (for which I do not have administrator rights)

Answer 1

And what difference does it make from which group, the code for receiving posts is the same
First you receive mail, download pictures, then post them via api to insta