Update README.md

Author: michaeltee

jsp-flexjs/README.md

@@ -1,6 +1,6 @@
 # Flex API Sample
 
-A simple client-side tokenization example integration using Flex Javascript SDK to access the Flex API. For more details on this see our Developer Guide at https://developer.cybersource.com/api/developer-guides/dita-flex/SAFlexibleToken/FlexAPI.html 
+A simple client-side tokenization example integration using Flex JavaScript SDK to access the Flex API. For more details on this see our Developer Guide at: https://developer.cybersource.com/api/developer-guides/dita-flex/SAFlexibleToken/FlexAPI.html 
 
 ## Prerequisites
 
@@ -11,11 +11,11 @@ A simple client-side tokenization example integration using Flex Javascript SDK
 
 ## Setup Instructions
 
-1. Modify `./src/main/webapp/credentials.properties` with the Cybersource REST credentials created through [EBC Portal](https://ebc2.cybersource.com/).
+1. Modify `./src/main/webapp/credentials.properties` with the CyberSource REST credentials created through [EBC Portal](https://ebc2test.cybersource.com/).
 
  ```
  merchantId=YOUR MERCHANT ID
- keyId=YOUR KEY ID
+ keyId=YOUR KEY ID (SHARED SECRET SERIAL NUMBER)
  sharedSecret=YOUR SHARED SECRET
  ```