Ring doorbell 2 - security screw

Hi- I inherited a ring doorbell 2 from my homes prior owner and I am needing to take the faceplate off to charge the battery. I am unable to locate the screwdriver for the security screw, anyone aware of any alternatives? I’ve contacted Ring support and they told me to purchase the spare parts kit but based on the description of the kit it doesn’t haven’t the part I need to remove the screw.