This module manages the creation and consumption of invite codes for the

host(s) it is loaded onto. It currently does not expose any admin/user-facing

functionality (though in the future it will probably gain a way to view/manage

pending invites).

Other modules can use the API from this module to create invite tokens which

can be used to e.g. register accounts or create automatic subscription approvals.

# Configuration

``` {.lua}

-- Configure the number of seconds a token is valid for (default 7 days)

invite_expiry = 86400 * 7

```

Note that all modules that use this API will automatically load this module,

so adding it to modules_enabled is generally not necessary.

# Compatibility

0.11 and later.