Call ImportFiles Rest API endpoint in Postman - https://www.wixapis.com/site-media/v1/files/import

I am trying access this Rest API end point “https://www.wixapis.com/site-media/v1/files/import” from Postman.

As per this documentation - Import File | REST

As attached in the images, I am sending the API Key, as an Authorisation Bearer token. It was generated using Account Settings > API Keys > Generate API Keys. For testing purpose, I have allowed all permissions for this token.

I also send wix-account-id and wix-site-id (these are valid too) in the headers.

But i get 403 Forbidden in the response.

As per the documentation, this call requires Wix App or Wix User identity. How can i create this and use it in the Postman call?

Ideally I want to call that API endpoint through Postman. What authorisation do i have to send in header?

I just have a website (Desktop and Mobile version), and no APPS.

This is working now. The account ID was prefixed with $. Once i removed it, it works.