PHP Connect to Microsoft Dynamics CRM

I am trying to connect to Microsoft Dynamics CRM using an Application or Client Id and a Client Secret based authentication. I have client id, client secret and Tenant Id.

But it does not seem to connect, I get the next error: "AADSTS90002: Tenant 'xxx-xxx-xxx-xxx-xxx' not found. Check to make sure you have the correct tenant ID and are signing into the correct cloud." eventhought the client claims that the tenant id is correct, so I am guessing I am doing something wrong here.

Here is the code:

$clientId = 'xxx-xxx-xx-xx-xx';
$clientSecret = 'test';
$resource = 'test.crm4.dynamics.com';
$tokenEndpoint = 'login.microsoftonline.com/.../token';

// Prepare the request body$params = array(
    'grant_type' => 'client_credentials',
    'client_id' => $clientId,
    'client_secret' => $clientSecret,
    'resource' => $resource
);
$query = http_build_query($params);

// Create the cURL request$ch = curl_init($tokenEndpoint);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $query);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

// Execute the request$response = curl_exec($ch);
curl_close($ch);

// Parse the response$data = json_decode($response, true);
print_r($response);

Then i should get the leads from the crm:

if (isset($data['access_token'])) {
    $accessToken = $data['access_token'];

    // Use the access token to make API requests// For example, retrieve leads$leadsEndpoint = 'test.crm4.dynamics.com/.../leads';
    $headers = array(
        'Authorization: Bearer ' . $accessToken,
        'Accept: application/json',
        'OData-MaxVersion: 4.0',
        'OData-Version: 4.0',
    );

    $ch = curl_init($leadsEndpoint);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

    $response = curl_exec($ch);
    curl_close($ch);

    // Process the leads response$leads = json_decode($response, true);
    foreach ($leads['value'] as$lead) {
        // Process each lead record as needed$leadId = $lead['leadid'];
        $fullName = $lead['fullname'];
        $email = $lead['emailaddress1'];

        echo"Lead ID: $leadId\n";
        echo"Full Name: $fullName\n";
        echo"Email: $email\n";
        echo"\n";
    }
} else {
    // Handle authentication errorif (isset($data['error_description'])) {
        echo"Authentication Error: " . $data['error_description'];
    } else {
        echo"Authentication Error";
    }
}

I do not understand what I am doing wrong, there are just a few examples on the internet. I have also tried Alexa CRM, but my php version is not suitable, as I cannot upgrade it because of the other projects on the server.

Please excuse my English, I am not a native English person.

Please help! Thank you!