createCustomer.php

<?php

public function createCustomerAccount()
{
    $base64 = base64_encode("username:password"); //I have replaced my username/password which i got from document
    $client = new \GuzzleHttp\Client();
    $response = $client->request('POST', "https://staging.identitymind.com/im/account/consumer", [
        'headers'  => ["Content-Type" => "application/json",'Authorization' => "Basic $base64"],
        \GuzzleHttp\RequestOptions::JSON => [
            'man' => 'JohnDoe',//Account name for the user//Maximum length is 60 characters
            'tea' => "johndoe@email.com",//Email address for the user Maximum length is 60 characters
            'bfn' => "John",
            'bln' => "Doe",
            'aflsd' => strtotime(Carbon::now()),//Creattion Date in unix timestamp
            'accountCreationTime' => strtotime(Carbon::now())
        ]
    ]);

    $body = $response->getBody();
    $stringBody = (string) $body;
    $response = json_decode($stringBody);
    var_dump($response);die();
}

Account Creation Response: