i am get getting this error and Call to undefined method Unicodeveloper\Paystack\Facades\Paystack::getAuthorizationUrl()

and this is my code

$data = array( "amount" => $this->total * 100, "reference" => 'ref-'.paystack()->genTranxRef(), "email" => $this->user->email, "currency" => "NGN", "orderID" => rand(999999999,10000000000000), "callback_url"=> route('payment.callback'), ); try{ $paystack = new Paystack(); $paymentDetails = $paystack->getAuthorizationUrl($data)->redirectNow(); dd($authorizationUrl = $paymentDetails->url()); // return $this->paystack->getAuthorizationUrl()->redirectNow(); // dd(Paystack()->getAuthorizationUrl($data)); }catch(Exception $e) { return Redirect::back()->withMessage(['message'=>'The paystack token has expired. Please refresh the page and try again.', 'type'=>'error']); }

i dont know if anyone can help me fix this bug