@Srikanth Gaddamanugu could you check whether the details presented in this recent form question retrieve passwords by rest service are what you are after? 

Also see the following documentation Deploying Pega Platform on an Amazon EKS cluster

Note that there are plans for the near future to support Cloud Secret Manager in Pega Infinity for BYOK use cases. The product will includes updates to the method we use to integrate our products with AWS Key Store to match the latest recommendation from AWS (GCP, and Azure).  It will simplify customers' security operations by allowing to use secrets and credentials that are stored in customers' key stores.  These would include options to:

• access external instances of Kafka
• access external APIs,
• secure APIs in Pega Platform.