[WA] Perth: $20 off First Ride @ Ola

Saw this on FB today, $20 off first ride on Ola (edit: looks like Perth only)

Valid for new customers only.
$20 will be deducted from the value of the Ride Fare for the first ride booked by you.
Manually enter ICECREAM in the ‘Apply Coupon’ section to redeem this offer.
Offer is not valid with any offer or promotion.
Excludes tolls/third-party charges
Offer only valid in Perth
Offer expires 1st January 2020