Help How can I get S-OFF on HTC Desire 510?

[Android Question]

I have been searching but I can't find any way to S-OFF my HTC Desire 510.

Here's some info about the phone's current state:

Device: HTC Desire 510
Phone Carrier: Telus Canada
Firmware: Currently running Android 4.4.2 (KitKat)
Root: Phone currently has root access
Recovery: Currently running TWRP 2.8.1.0