Can I request for token with Merchant ID and APP ID

[Nasirkhan-259]

I am trying to get access token via Merchant Id and APP ID , is it possible
As I don't have client_id and client_secret
TypeError: Argument 1 passed to Sebdesign\VivaPayments\OAuth::token() must be of the type string, null given

[sebdesign]

I don't think it's possible to get an access token using the Merchant ID and the App ID.
https://developer.vivawallet.com/integration-reference/oauth2-authentication/#step-2-request-access-token

Can you show me the code? It seems you are passing null instead of a string.

[Nasirkhan-259]

$oauth = app(OAuth::class);
// Using `client_id` and `client_secret` from `config/services.php`:
// The token will be automatically stored on the client and used as a Bearer token.
        $token = $oauth->requestToken('**********', '**********', $guzzleOptions = []);
        dd($token);

this is the error that return now I am using client id and client secret id instead if merchant Id and App Id

GuzzleHttp\Exception\ClientException: Client error: `POST https://demo-accounts.vivapayments.com/connect/token` resulted in a `400 Bad Request` response:
{"error":"invalid_client"}
 in file C:\xamp_7.4\htdocs\mobileapi\vendor\guzzlehttp\guzzle\src\Exception\RequestException.php on line 113 

Am I missing something