Fixed link in main README.md

Author: jaaufauvre

README.md

@@ -1,5 +1,5 @@
 # mastercard-api-client-tutorial
 
-[Generating and Configuring a Mastercard API Client](https://developer.mastercard.com/platform/documentation/generating-and-configuring-a-mastercard-api-client/) explains how to generate and configure a simple API client for one of the APIs offered on the [Mastercard Developer portal](https://developer.mastercard.com/apis). 
+[Generating and Configuring a Mastercard API Client](https://developer.mastercard.com/platform/documentation/security-and-authentication/generating-and-configuring-a-mastercard-api-client/) explains how to generate and configure a simple API client for one of the APIs offered on the [Mastercard Developer portal](https://developer.mastercard.com/apis). 
 
 Languages used in this tutorial: Java, Python, NodeJS, Ruby, PHP and C#.