public function stkpush(Request $request)
{
    $url='https://sandbox.safaricom.co.ke/mpesa/stkpush/v1/processrequest';

    $curl_post_data=[
        'BusinessShortCode'=>174379,
        'Password'=>$this->lipanampesapassword(),
        'Timestamp'=>Carbon::rawParse('now')->format('YmdHms'),

        'TransactionType'=> "CustomerPayBillOnline",
        'Amount'=>1,
        'PartyA'=>254712345678,
        'PartyB'=>174379,
        'PhoneNumber'=>254712345678,
        'CallBackURL'=>'https://89af-196-202-210-53.eu.ngrok.io/api/mpesa/callbackurl',
        'AccountReference'=>'Waweru Enterprises',
        'TransactionDesc'=>'Paying for Products Bought'
    ];

    $data_string=json_encode($curl_post_data);

    $curl=curl_init();
    curl_setopt($curl,CURLOPT_URL,$url);
    curl_setopt($curl,CURLOPT_HTTPHEADER,array('Content-Type:application/json','Authorization:Bearer '.$this->newaccesstoken()));
    curl_setopt($curl,CURLOPT_RETURNTRANSFER,true);
    curl_setopt($curl,CURLOPT_POST,true);
    curl_setopt($curl,CURLOPT_POSTFIELDS,$data_string);

    $curl_response=curl_exec($curl);
    return $curl_response;
}