Two-factor authentication recovery codes
+Fields
+------
+
| Field | Description | Type | Null | Key | Default | Extra |
| --------- | ------------------------------- | ------------------ | ---- | --- | ------- | ----- |
| uid | User ID | mediumint unsigned | NO | PRI | NULL | |
| generated | Datetime the code was generated | datetime | NO | | NULL | |
| used | Datetime the code was used | datetime | YES | | NULL | |
+Indexes
+------------
+
+| Name | Fields |
+| ------- | --------- |
+| PRIMARY | uid, code |
+
+Foreign Keys
+------------
+
+| Field | Target Table | Target Field |
+|-------|--------------|--------------|
+| uid | [user](help/database/db_user) | uid |
+
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