How do I get a POD image from an API call - php

Question

I am calling an API of a shipping company to get the POD (Proof of delivery) image of a delivery as per this document.
I am expecting to see an image but the the API response is null.
Here is my code:
$host = "api.shiplogic.com";
$accessKey = 'AKIA55D5DNTBI4X24BCM'; //Sandbox credentials
$secretKey = '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'; //Sandbox credentials
$requestUrl = 'https://api.shiplogic.com';
$uri = '/shipments/pod/images?';
$httpRequestMethod = 'GET';
$data = 'tracking_reference=';
$refnr = 'FQJNF'; //created for testing
require 'AWS/aws-autoloader.php';;
use Aws\Signature\SignatureV4;
use Aws\Credentials\Credentials;
use GuzzleHttp\Client;
use GuzzleHttp\Psr7\Request;
use Psr\Http\Client\ClientInterface;
$signature = new SignatureV4('execute-api', 'af-south-1');
$credentials = new Credentials($accessKey, $secretKey);
$psr7Request = new Request($httpRequestMethod, $requestUrl.$uri.$data.$refnr);
$client = new Client([$requestUrl, 'timeout' => 30]);
$sr = $signature->signRequest($psr7Request, $credentials);
$response = $client->send($sr);
$json = $response->getBody()->getContents();
echo $json;
I have tried to var_dump() and print_r()
What am I missing or doing wrong?
[{"id":203913730,"parcel_id":0,"date":"2022-08-05T09:44:19.704Z","status":"delivered","source":"danieladmin","message":"POD file(s) captured","data":{"images":["https://shiplogic-backend-prod-infra-images-and-notes.s3.af-south-1.amazonaws.com/shipment-images/8155533-fe1e0e10-324c-4360-b2f4-be51f091f8bb.png?X-Amz-Algorithm=AWS4-HMAC-SHA256\u0026X-Amz-Credential=ASIA55D5DNTBLMDRXYD5%2F20220805%2Faf-south-1%2Fs3%2Faws4_request\u0026X-Amz-Date=20220805T113651Z\u0026X-Amz-Expires=86400\u0026X-Amz-Security-Token=IQoJb3JpZ2luX2VjEJ7%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCmFmLXNvdXRoLTEiRzBFAiB4vd1t%2F11LRUaoSCpqMdIP8gOuT9L32p1LSyCzSiGUBQIhAMt8FtNGK6ibRWvAJtIf%2FIGvOsESyCw2bIgNl27PWYBwKp0DCLv%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAhoMOTU1ODkyNTkxODEwIgwhD2CnEtahYg8Ck0Iq8QLMbochjBL6wQyuYPgOrOyvgliZs44WoRZqjDllfIPfa86R5TDw6hKI6aTaQLpNWUInFDnrGRu7sd%2BolgUsqnN17lr20S2h7Fy%2FnU0Rwv2z11AYSXgXrvxWbHVMJzngkyfteitp0GpD3cjK%2BdIJ9iKRS8g%2BO5WfFQKu99StSfkTWgJ%2Fo1myNwJoJkWkWhYiO1c%2BStpBSs0vdKhSKLOuNu3HBQIpWTQ1U8qnGvNdigAdz%2B7gCJwsaNqUH%2FHtl3xNSSbUSkEzqYLzdkjmKNFUC%2BrVAePsS4UnVhkMmWlnal%2BvSI%2FgY%2BDE1IuuhWYl7kuWa5SC6E5p2vngpN9lm0EnDSmK3OFsohMIJnu23WUXBJTxpmx%2Fb6KL%2FPrXapAhHccAz%2FJFmeU55%2FnMp0AqiuHjWYWE1ei1TPR2mhyj94wTW3Y4lUxhnvfeHz7QmPeh3KN3HAN0S2WHDf9Bv1gUD6bDshj1tiREoeChZzfp1ZbArO86AOgw%2BcSzlwY6nQFtpA37RYzkLVk52OW4g1tyja35Mfs6%2FykajH9IqkjuTLqvNmGIfrS7cLGgqhvdLUEs3QTIYDfPbjgkNsl5roEHbI7NO%2FhfrjIpBVmOsxJsqp62yL8Ze%2F29hgfug0TnycpXSg1bAOQ5ROelqQi5kcuy%2FTT3tePuZy1EO%2BXTm0tQbE3tf0XkLw34cQ6078ZAQJ7tyI4R4qRnWfdTkLtM\u0026X-Amz-SignedHeaders=host\u0026X-Amz-Signature=9a3d73a886012ac24e4719888156922d840a73d43569934a8de33ab2336f47b1"]}}]
<Error>
<Code>AuthorizationQueryParametersError</Code>
<Message>
X-Amz-Algorithm only supports "AWS4-HMAC-SHA256 and AWS4-ECDSA-P256-SHA256"
</Message>
<RequestId>ECGG4HGD86Y0PYAY</RequestId>
<HostId>
qZHFwL8gZ3GEibJ6UmgAoNd97EMVGe1Xw24RjYIKAqqrOi2Cx+YPmBJGoCy4opTiih5Nz5YlEuU=
</HostId>
</Error>

Answer 1

Your code is actually entirely correct as far as getting the response, but the problem is that the response you're trying to copy the URL from is still JSON encoded. This leaves some of the parts of the URL in an invalid, encoded state; specifically, the & is encoded to /u0026.
...?X-Amz-Algorithm=AWS4-HMAC-SHA256\u0026...
That /u0026 at the end of each parameter is the culprit. If you json_decode() the response, then you get the correct URL.
The URL I received when I ran the code and decoded the result seems to work. All I did was add a line and change the last line:
...
$json = $response->getBody()->getContents();
$result = json_decode($json, false);
echo $result[0]->data->images[0];
You could obviously do that without adding a line and just changing the line where $json is assigned, but I wanted to leave that line alone to make it easier to see exactly what was different.
...
$json = json_decode($response->getBody()->getContents(), false);
echo $json[0]->data->images[0];