Automatically create an account on a website with Python

I am currently trying to complete a registration automatically with Python but I have troubles.

The website is avito.ma. I want to create automatically an account with Python but I don't arrive to.

The problem is that when I try to find the hidden headers on the url, there is nothing. I tried Postman but It doesn't catch any header. There is a POST with a json file that is used this time and not a GET therefore I don't know how can I do this task automatically.

I used BeautifulSoup.

Thank you.

Nacer