Walk Behind Lawn Mowers

Just bought a Husqvarna le121p walk behind mower yesterday, from Lowes. It was a display model. Everything came with it (two batteries, manual, grass catcher, charger, etc) Except the saftey key needed to actually start the mower, which we didn't know until we got it home and wanted to cut our grass today. Been trying to find a parts page, but can't seem to find any actual parts pages on the Husqvarna website, the Parts section seems to be all goggles, gloves, and oils, not actual parts.

Is there any way to start the mower Without this missing key? How do we get a replacement? Lowes was no help when we called, and the cust support number for Husqvarna says it's closed.

This was a major purchase for us so so far we're pretty upset about this.