Using a user’s full name in the URL I like to have the user’s full name in their profile page-url rather than the username in case they don’t want their username associated with their full name. In my case they don’t get to set the username at the sign up point but might been asked for a username by the person signing them up.

So, how do i use the user’s full name as an identifier in the url of their profile page?

Like so: example.com/user/first-last

Is that even possible?
Marcus, I think you can use anything as an url for a user's page. In your case, I'd make a dynamic route like:

user/*


and assign it a template, for instance:

user/_entry


Within that template, all you'd have to do is lookup the user by the match found in the url. The variable matches contains the first-last part (the * part of your route). With that, the user should be easy to find:

{% set names = matches[1] | split('-') %}
{% set user = craft.users.firstName(names[0]).lastName(names[1]).first() %}

{% if user %}
    // Do with it what you want
{% endif %}


You'd have to be careful, however, that no two identical first- and last name combinations exists. The advantage of using the username is that it's always unique.