plz help unlock bootloader for galaxy s5 g900w8

Hi guys, i hav been searching the web on how to unlock the gs5 bootloader but have no luck.
I want to root the phone but i can't root it until the bootloader is unlocked and apparently i can't find software/tool to unlock the bootloader.:eek:
Somebody plz show me a way to unlock the bootloader. My phone is Samsung Galaxy S5 G900W8 running android 6.0.1 build dpd3.
Thanks:)