$ ssh-keygen -t ed25519 -f /c/Users/dev001/.ssh/frontend/id_ed25519

Frontend
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDFLCovCc7NzbCCch+oTLCgWPlnRpwOLDRgU7QOhhfoz Administrator@EC2AMAZ-91I3HTN

Backend
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIM9R6d3U1KDNGuKFFC7pT2CSNvz7Z7NbuTdVY0WKOALI Administrator@EC2AMAZ-91I3HTN