Add email verification to sign up process for customer loyalty

Hello, I wanted to update this request. Originally I posted this to help reduce the amount of customer support tickets that we need to coordinate with Linga on, however, a new issue has been discovered. We have seen customers creating multiple accounts whenever they wanted a free drink with a recent case being a customer who used 5 different accounts within a single day! I realize there is no 100% solution to this as email accounts can be freely created but there is a huge difference between the added need of creating a 3rd party account and verifying the account. This should be an easy way to add an initial hurdle to help prevent account abuse.