Merchant APP ID (Alphanumeric - Length of 32 chars and special chars $@%#)
Merchant APP KEY (Alphanumeric - Length of 32 chars and special chars $@%#)
EPI is an end point identifier, Identify the device on valor infrastructure, it's a 10 digit number starts with 2
If the merchant has multi-MIDs, they need to send both the child EPI and the parent EPI in the EPI request
200