Non-authenticated/guest access to Grip

We want to add the ability to give users access to the platform without the need to authenticate.

Without compromising on security and functionality, we would love to build in limited access to Grip's features without the requirement to set up an account.

This will be particularly useful for event organizers looking to use our directory and event program functionality for standard attendees, especially when they are using the event app.

Further scoping to come...