Using a private key for git/ssh

Hi,

I'm using phpstorm 2019.1. As per previous posts I have converted my ppk to open ssh but can't load that into pageant. I'm also running the start-ssh-pageant.cmd file, but I can see on my remote git repo that a password is still being used by phpstorm/git when trying to connect, which then fails and triggers our fail2ban.

I can't find any SSH options for keys when using git in settings. How do I configure this?