From your Braintree account, copy your production Merchant Id, Public Key, Private Key, and Tokenization Key and then send (copy & paste) these details to mypreorder (via a new support ticket).
- Log in to your Braintree Payments production account.
- Go to Settings > API Keys
- Look for your Merchant Id, Public Key, Private Key, and Tokenization Key (generate new keys as necessary) then send (copy & paste) these details to mypreorder (via a new support ticket).