I am using Google Login Plugin v1.1

My script is

echo Build User : $BUILD_USER
echo First Name : $BUILD_USER_FIRST_NAME
echo Last Name : $BUILD_USER_LAST_NAME
echo Build User ID : $BUILD_USER_ID

and output is

Build User : Gurpreet Singh Bawa
First Name : Gurpreet
Last Name : Singh
Build User ID : gurpreet.bawa@snapdeal.com

The last name should be picked as "Bawa" and not "Singh"
I am not able to find a way to take "Bawa" as the Last Name. Please help me here.