Auth::changePassword() -- change the password of a user
Description
     Change the password of a user within the Auth Container.
    
Parameter
     
- string
        $username
         
         the username of the user
        
- string
        $password
         
         the new password for the user
        
 
    Return value
     mixed - 
     TRUE on success, a PEAR Error on failure.
    
Note
This function can not be called
statically.
     Not all Auth Containers implement this functionality.