zillow - 如何解决 Zillow API 帐户未授权错误？

Question

SimpleXMLElement 对象 ( [请求] => SimpleXMLElement 对象 ( [地址] => SimpleXMLElement 对象 ( )

        [citystatezip] => SimpleXMLElement Object
            (
            )

    )

[message] => SimpleXMLElement Object
    (
        [text] => Error: this account is not authorized to execute this API call
        [code] => 6
    )

)