I have created an ssh key with a passphrase and connected it with github successfully and use the ssh -T git@github.com to test it and it asked me for the passphrase and it worked.
But now when I push or pull anything it doesn't ask me for the passphrase so I thought that the key isn't used, So I deleted it and worked without it and git nor github didn't even ask me for anything, and the work is done.
So my question here is I need to know how to link this ssh key to github and make it ask me about the passphrase of the key whenever I do any thing.