STK Request

Wrap your request in a try catch to ensure proper error handling

try {
    return $res = C2B::stk($phone, $amount, $reference);

    // Do something with $res, like save to DB with the $res["MerchantRequestID"] as key.
} catch (\Throwable $th) {
    return $th;
}

OR

try {
    return $res = STK::send($phone, $amount, $reference);

    // Do something with $res, like save to DB with the $res["MerchantRequestID"] as key.
} catch (\Throwable $th) {
    return $th;
}