Variable + pageref

{
    "log": {
        "pages": [
            {
                "id": "group_0",
                "title": "Group 0"
            }
        ],
        "entries": [
            {
                "pageref": "group_0",
                "request": {
                    "url": "http://api.example.com/authenticate",
                    "method": "POST",
                    "postData": {
                        "mimeType": "application/json",
                        "text": "{\"username\":\"admin\",\"password\":\"123\"}"
                    }
                },
                "variables": [
                    {
                        "name": "accessToken",
                        "type": 0,
                        "expression": "user.token"
                    }
                ]
            },
            {
                "request": {
                    "url": "http://api.example.com/users",
                    "method": "GET",
                    "headers": [
                        {
                            "name": "Authorization",
                            "value": "Bearer ${accessToken}"
                        }
                    ]
                }
            }
        ]
    }
}