Create Multiple ssh file with diffrent name first
You need to have ~/.ssh/config file
if not file found create
touch ~/.ssh/config
Inside file
# Default GitHub user
Host github.com
HostName github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/personalid
# Work user account
Host bitbucket.org
HostName bitbucket.org
PreferredAuthentications publickey
IdentityFile ~/.ssh/workid