Validate email on new account

[ddfridley]

When a user creates an account, send them an email where they click on a link to validate their email address.

Only valid for a programmable number of minutes. Then they have to issue a new link to validate.

UX -
When the user uses the AuthForm to join, after they hit join the are given a "Welcome" message.
Instead that message should say "Check you email for a confirmation message".
There should also be a button saying "Resend"
The user will receive a message that has a link to click on.
The user clicks on that link and a new page/tab opens up. (Consider that the user could be opening the email on their phone, while they are joining from the browser on their laptop).
The user taps on a button that says "Confirm"
That tab/window closes.
In the original tab window, the status message changes to "Welcome" and then goes to the next page.