Repair Power Button - Broken from the board

Hi,

My Moto G2, Power button is broken. The phone is brand new and the button stopped working and was not clicking at all in 20 days of use. Initially I had the impression that the button must have got stuck or something and simply opening the phone and placing the button proper position would fix it. But when I opened the phone and saw that the button itself was detached from the board.

Can you please post some steps highlighting the button and the corresponding assembly.

Thanks