Can someone help in RazorPay payment gateway integrationin Xamarin.ios

Question

I had installed the Cocoapods as i followed the steps from that article https://www.c-sharpcorner.com/article/creating-xamarin-ios-binding-for-razorpay-payment-gateway/ but i am stuck on the 6th step , and i didn't find any way to resolve it ..so can anyone tell me step by step  how could i done it .