{ "type": "object", "required": ["id", "login", "url", "avatar_url"], "properties" : { "id": { "type": "integer" }, "login": { "type": "string" }, "url": { "type": "string" }, "avatar_url": { "type": [ "string", "null" ] }, "html_url": { "type": "string" } }, "additionalProperties": false }