get_password_hint
Description:
Retrieves the password hint set by this.
Parameters:
| this | the user object to examine. | 
Returns:
| a pointer to an array of characters which must not be modified or freed, or  | 
Retrieves the password hint set by this.
| this | the user object to examine. | 
| a pointer to an array of characters which must not be modified or freed, or  |