How to configure the SSH key for git on the Windows 10 ubuntu subsystem

I use ubuntu bash (subsystem) under Windows 10 as shell. I have a gitlab git repository that I've cloned. When I use the git of this shell, it is separated from my Windows git and I can not use my SSH key. He keeps asking my user / password.

I'm putting my id_rsa and in ~ / .ssh / (ubuntu subsystem path)

An idea?