question: private boolean validateToken ( String authHeader ) throws MSF4JSecurityException { String accessToken = extractAccessToken ( authHeader ) ; String responseStr = getValidatedTokenResponse ( accessToken ) ; Map < String , String > responseData = getResponseDataMap ( responseStr ) ; if ( ! Boolean . parseBoolean ( responseData . get ( IntrospectionResponse . ACTIVE ) ) ) { throw new MSF4JSecurityException ( SecurityErrorCode . AUTHENTICATION_FAILURE , "Invalid Access token." ) ; } return true ; }
target:  Extract the accessToken from the give Authorization header value and validates the accessToken with an external key manager.