How to create Customer otp verification in POS in ERPNext 15

I want to create new customer from POS Whenever I add a customer’s number, the customer has to get some OTP for verification. Like we get when we buy product from new shop and cashier ask our mobile number and we get OTP

First, Integrate the SMS setting and then set notification on customer creation

Thanks for your reply @Usama_Naveed , can you tell how to integrate that SMS setting and what Gateway URL have to use.