How to Allow Shared User to Connect to Their Wifi

I purchased a Ring Doorbell to install on my rental property. I registered it and bought the Ring Protect plan. Then I mounted it on my rental and used the Shared Users feature to email both the tenants access. They installed the Ring app but said they couldn't connect the Ring to their Wifi. They are telling me I have to remove the Ring Doorbell from my property and gift them the unit so they can take it with them when they leave. I already cut the siding on the house to fit the doorbell on so I don't want to un-mount it and I don't want to just give them the device -- I want it to stay mounted on my rental and let the next tenants use it. I don't believe they are telling me the truth that in order to connect to Wifi, I have to GIVE them the device. But I have searched high and low and cannot find instructions anywhere about how my tenants can connect to their Wifi. So now we're at an impasse, and I'm paying for an annual plan for something that they're not using. What's the solution? I feel like I must be missing something simple.