public int getSessionDuration() {
        return this.sessionDuration;
    }
Get the duration of the session credentials created by this client in
seconds. Values must be supported by AssumeRoleWithWebIdentityRequest.

@see com.amazonaws.services.securitytoken.model.AssumeRoleWithWebIdentityRequest 

@return The duration for session credentials created by this provider
aws-java-sdk-sts/src/main/java/com/amazonaws/auth/WebIdentityFederationSessionCredentialsProvider.java