You need to get an access token to your subscription first.
To do this, using Postman or similar software, you must send a POST request by URL: https://api.stacksandbox.com
with body: userName=your_email_login&password=your_password&grant_type=password
Example:
In response you will get JSON with access_token parameter.
Example:
Now you can get statistics via our API.
You just need to indicate this Token in your request header like this: Authorization: Bearer your_token_here