Permissions.json

{
    "flexible_sync": {
        "state": "enabled",
        "permissions": {
            "rules": {},
            "User": {
                "roles": [
                    {
                        "name": "anyone",
                        "applyWhen": {},
                        "read": {
                            "_id": "%%user.id"
                        },
                        "write": {
                            "_id": "%%user.id"
                        }
                    }
                ]
            },
            "Chatster": {
                "roles": [
                    {
                        "name": "anyone",
                        "applyWhen": {},
                        "read": true,
                        "write": false
                    }
                ]
            },
            "ChatMessage": {
                "roles": [
                    {
                        "name": "anyone",
                        "applyWhen": {},
                        "read": {},
                        "write": {
                            "authorID": "%%user.id"
                        }
                    }
                ]
            },
            "defaultRoles": [
                {
                    "name": "all",
                    "applyWhen": {},
                    "read": {},
                    "write": {}
                }
            ]
        },
        "queryable_fields_names": ["_id", "userName", "conversationID", "authorID"]
    }
}