Realm endpoint not working in GraphQL Playground

I’m trying to use GraphQL Playground with the endpoint that Realm supplies. It gives me a 401 error code. I attached screenshots.

Is that endpoint designed to work with GraphQL Playground?

Is that endpoint designed to work with GraphQL Playground?

Yes, you should be able to use it with playground, but you need to remember to add your authorization header to GraphQL Playground like so:

{
  "Authorization": "Bearer <access_token>"
}

To get the access token, you can use any one of the cURL commands listed here