Automatically mount sshfs on login, using gnome keyring

Question

I understand the purpose of /etc/fstab is used to mount volumes on boot. However, in my case I have an sshfs that requires an encrypted identity file.

So how would I go about supplying passphrase for the identity file when automatically mounting sshfs?

Obviously I don't want the passphrase or decrypted identity file out in the open. But I hate typing in my passwords over and over again. So my goal is to have the sshfs connection mounted with the identity file which has been decrypted by the gnome keyring when I log into my computer... what a mouthful.

Thanks!