I am trying to use spring jdbc session and I want to store the IAuthenticationResult object returned on calling ClientConfidentialParamter.acquireToken() method. However, I keep getting the error that IAuthenticationResult cannot be serialized. I looked into it and realized that IAuthenticationResult is an interface. AuthenticationResult is the subclass but I cannot use it as its visibility is default in the package and I dont have access to it. Is there anyother way to serialize/deserialize IAuthenticationResult data?