Family member cannot see devices

Have clicked on email inviting me to join home security system and downloaded the app created my own.login and logged in but I can’t see any devices…it I my own account and a totally separate/new set up.

How do I join my husband/family/home set up. He sent an email that included a number of devices but I cannot see them

Don’t use the invite friends option. You need to log into the same account as your husband.