In the owner's manual I found the below information and was able to create a Sprocket Shared Event. I wish the event was valid for longer than 2 hours. What about a conference or a weekend getaway?
Sprocket Shared Event With the sprocket app, easily back up your party photos while connected to your sprocket printer by creating a Sprocket Shared Event and invite your friends to get in on the fun. Everyone who joins the album and prints with an HP sprocket during the party will have their photos archived with Google Photo. It is a simple way to make sure that all attendees get every awesome shot! In the Google Photos gallery, tap the icon to the right of the center circle. As a first time user, you will be prompted to create a Sprocket Shared Event and start your Google Shared Album. As a returning user, you will be prompted right away to name your event. Name your event, set the duration time, and invite guests to print and contribute to the shared album. All photos printed will still be accessible at the Sprocket Shared Event link after the party.