SSH to Dell switch without password

When I SSH to a dell switch, it asks me for a password. I'm trying to set the SSH keys so it wouldn't ask me for that but I just can't get it to work. I couldn't find anything useful online or in Dell's documentation.

How do I edit the authorized keys so that I could SSH without a password?

Also, when I log in, I have to type en to start the shell. Can I disable the need for that too?

I've never worked with Dell before and I don't know the model. When I type show version, this is what I see:

Image Descriptions image1 : default image image2 : Images currently available on Flash -------------------------------------------------------------------- unit image1 image2 current-active next-active -------------------------------------------------------------------- 5 3.3.1.10 3.3.5.5 image2 image2 

Thanks ahaed.