Email
Only used for authentication and notifications. You can provide a fake email as long as you don't mind not getting notifications.
Password
Password confirmation
Lightning Address
Lightning Node ID including host and port required to connect to your node. Example:
0302536817c335e45bcd0b10b78fd06bc246609405d98eb64672410dce04f49e5f@mueqiomlbw6yq7smawrdogfzttmzkw4ouuovcyut7mmozowccb3bodqd.onion:9735
Can connect to TOR nodes
Most nodes like Umbrel can connect to TOR (onion) nodes.