Magento 2.3 – How to Overwrite Customer Registration REST API

So @user2636834 did you figure this one out already?

I remember when I was setting up a test scenario that I got the sames error(s). Seemed that I didn't have Oauth installed :O. So in short I did (running Ubuntu and following these instructions, also running into this error):

pecl install oauth

Then add extension=oauth.so to php.ini's "Dynamic Extensions" section. Then restart Apache

I tried the examples from the Magento site and got an error from the API:

"Invalid auth/bad request"

I had to add a 'Accept' => '*/*' header to the $oauthClient->fetch() call. After that it worked all just fine.

Hope you can get things running if you hadn't already.

Create new customer

$userData = array("username" => "admin", "password" => "admin123");
$ch = curl_init("http://magento213/index.php/rest/V1/integration/admin/token");
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($userData));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json", "Content-Lenght: " . strlen(json_encode($userData))));

$token = curl_exec($ch);


$customerData = [
    'customer' => [
        "email" => "user@example.com",
        "firstname" => "John",
        "lastname" => "Doe",
        "storeId" => 1,
        "websiteId" => 1
    ],
    "password" => "Demo1234"
];

$ch = curl_init("http://magento213/index.php/rest/V1/customers");
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($customerData));
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json", "Authorization: Bearer " . json_decode($token)));

$result = curl_exec($ch);

$result = json_decode($result, 1);
echo '<pre>';print_r($result);

//For update

$customerData = [
    'customer' => [
        'id' => 10,
        "email" => "user@example.com",
        "firstname" => "John2",
        "lastname" => "Doe2",
        "storeId" => 1,
        "websiteId" => 1
    ],
    "password" => "Demo1234"
];

$ch = curl_init("http://magento213/index.php/rest/V1/customers/10");
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($customerData));
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json", "Authorization: Bearer " . json_decode($token)));

$result = curl_exec($ch);

$result = json_decode($result, 1);
echo '<pre>';print_r($result);

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