## Overview
Let users invite others to join an instance.
## Background
Good for when registration is closed, or closed-group instances.
### Users
All users on a multi-user instance.
## Implementation
Create new database table that holds invite information:
| id | owner_id | max_uses | expires |
| --- | --- | --- | --- |
| abc123 | 1 | 10 | 2019-01-01 |