Creating a URL Link to a login protected page

I would like to create a URL to a users page normally accessible only by logging in.

I am running a task sending an email to all users who attended a specific course asking them to fill in a questionnaire, I am trying to make this as easy and quick as possible for the user to encourage them to participate.

To this end, instead of asking the user to login I want to send them a link that identifies the user and takes them directly to the survey for that Course.

Any help greatly appreciated.