I have an AX 3000 set as an access point. After a period of time the set password no longer works. This is true even in router mode. I know the answer in reset and start over, but this is...

I have two routers, AX5400 and AX3000 registered under my name and email. These routers are used in our church. How do I move them from my email to an email used by the church?