Cmder - 'eval' command is not recognized
λ eval
'eval' is not recognized as an internal or external command, operable program or batch file.
Just downloaded it for Windows 10.
Use bash first to get into a bash shell. Then eval will work just fine.
If you just want to add ssh-key to ssh-agent, use the below command.
start-ssh-agent.cmd
This will add default private keys such as id_rsa
If You are using windows 10 and VS code, You can use git Bash in terminal - for me it worked.