问人脸比对API，签名串生成的数据一致，但是返回签名错误？

提问于 2019-04-12 19:52:11

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{"Response":{"Error":{"Code":"AuthFailure.SignatureFailure","Message":"The provided credentials could not be validated. Please check your signature is correct."},"RequestId":"81866e51-2df7-42c4-977a-c649f0f32a5e"}}