I bought a used Clover Mini, thinking I could reset it and activate it with my Sandbox account. Now, I can't figure out how to factory reset it without the admin password. I asked the previous owner several times, but they wouldn't tell me. I don't want to pay $700 when I already bought a perfectly fine reader. Is there a way to factory reset it without the admin pin. Will there be a way to add it to my developer account?