friendica/doc/database/db_register.md

Table register
===========
registrations requiring admin approval

| Field | Description | Type | Null | Key | Default | Extra |
| ----- | ----------- | ---- | ---- | --- | ------- | ----- |
| id       | sequential ID | int unsigned       | NO  | PRI | NULL                | auto_increment |    
| hash     |               | varchar(255)       | NO  |     |                     |                |    
| created  |               | datetime           | NO  |     | 0001-01-01 00:00:00 |                |    
| uid      | User id       | mediumint unsigned | NO  |     | 0                   |                |    
| password |               | varchar(255)       | NO  |     |                     |                |    
| language |               | varchar(16)        | NO  |     |                     |                |    
| note     |               | text               | YES |     | NULL                |                |    

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