Hello! I bought a used Lockitron v1 at goodwill. I'm trying to install it but it says invalid serial number and then i tried online and it says device already registered. I have no way of contacting the previous owner to remove it from their account so can anyone help? I've reached out to lockitron support but haven't gotten any replies yet. Was hoping someone here might be of help. I've also tried using talentedcafe41 and clearing wifi settings but i still get invalid serial. Can anyone help?