Wix API Call without OAuth

Question:
I am creating an app in Wix. I am logged in as Wix partner and generated API key. I have created a development store for my testing purpose. Without going through oAuth how can I call a Wix API for my development store

What are you trying to achieve:
I’m trying to fetch the details of stores that uses my wix app

What have you already tried:
I have tried “https://www.wixapis.com/site-list/v2/sites/query” but it says 403 error even after passing apikey

Additional information:
And also is there any way to create token for the store in wix ?