{http.StatusForbidden, credentials.SecretKey, map[string]string{"AWSAccessKeyId": "invalidaccesskey"}},
		{http.StatusForbidden, "invalidsecretkey", map[string]string{"AWSAccessKeyId": credentials.AccessKey}},
		{http.StatusNoContent, credentials.SecretKey, map[string]string{"AWSAccessKeyId": credentials.AccessKey}},
		{http.StatusForbidden, credentials.SecretKey, map[string]string{"Awsaccesskeyid": "invalidaccesskey"}},

			}
		}
		delete(checkHeader, formCanonicalName)
	}
	// For SignV2 - Signature/AWSAccessKeyId field will be ignored.
	if _, ok := formValues[xhttp.AmzSignatureV2]; ok {
		delete(checkHeader, xhttp.AmzSignatureV2)
		for k := range checkHeader {
			// case-insensitivity for AWSAccessKeyId
			if strings.EqualFold(k, xhttp.AmzAccessKeyID) {
				delete(checkHeader, k)
				break
			}
		}
	}

	testCases := []struct {
		inputQueryKey   string
		inputQueryValue string
		expectedResult  bool
	}{
		// Test case - 1.
		// Test case with query key "AWSAccessKeyId" set.
		{"", "", false},
		// Test case - 2.
		{"AWSAccessKeyId", "", true},
		// Test case - 3.
		{"X-Amz-Content-Sha256", "", false},
	}

	for i, testCase := range testCases {
		// creating an input HTTP request.

	// Construct the final presigned URL.
	return nil
}

// preSignV2 - presign the request in following style.
// https://${S3_BUCKET}.s3.amazonaws.com/${S3_OBJECT}?AWSAccessKeyId=${S3_ACCESS_KEY}&Expires=${TIMESTAMP}&Signature=${SIGNATURE}.
func preSignV2(req *http.Request, accessKeyID, secretAccessKey string, expires int64) error {
	// Presign is not needed for anonymous credentials.