make ssh for your git profile
ssh-keygen -t ed25519 -C "global@gmail.com" -f ~/.ssh/id_ed25519_global
ssh-keygen -t ed25519 -C "work@gmail.com" -f ~/.ssh/id_ed25519_work
ssh-keygen -t ed25519 -C "personal@gmail.com" -f ~/.ssh/id_ed25519_personal
usually I cp global to only id_ed25519 for default user