Hi @dogemaster,
It's strange, right? For me, in Postman, it returns a 204 message, so no token, nothing, is returned.
I found a workaround, though.
I had Postman construct a cURL request and added the -v tag to get details. In that verbose response, you will find the X-auth-access-token! It will also include the domainUUID and other values, which are needed for many requests.
Plug that into Postman and send the GET request successfully.