Hi, Praveen!
The possible way to pass custom parameters is `state`. Did you try this?
here is the java class for ref: [https://github.com/GluuFederation/oxAuth/blob/82789475b40c07a348c5516492bcd30bfe7297d4/Client/src/main/java/org/xdi/oxauth/client/AuthorizationResponse.java](https://github.com/GluuFederation/oxAuth/blob/82789475b40c07a348c5516492bcd30bfe7297d4/Client/src/main/java/org/xdi/oxauth/client/AuthorizationResponse.java)