You can use the goat tool to migrate accounts between PDSes

1. Run 'go run ./cmd/goat account login -u <existing account> -p <password>'
2. Request a PLC token via email with 'go run ./cmd/goat account plc request-token'
3. Request an invite code on the new server
4. Run the migration with:

   goat account migrate \
       --pds-host <https://newpds.server> \
       --new-handle <newhandle.newpds.server> \
       --new-password <new password> \
       --new-email <new email> \
       --plc-token <the PLC token requested earlier> \
       --invite-code <the invite code requested earlier>