How to get users with birthday today in plugin/module? How does one retrieve users from Craft3 DB whose birthday is today?

Birthdate field type is Date/Time. 

Have a working PHP/MySQL example, but unsure how to port this to Craft3 syntax.

$sql = 'SELECT 
            id,
            birthDate
         FROM 
            !
         WHERE 
            status = ?';


$users = $db-&gt;getAll($sql, array( USERS_TABLE, 
                                  'active', 
                                  date('j'),
                                  date('n')
                                ) 
                    );  


Craft plugin

$users = \craft\elements\User::find()
           -&gt;group('siteUsers')
           -&gt;status('active')
           -&gt;all();
Was able to get the results I needed by using the following query: 

        $users = \craft\elements\User::find()
            -&gt;where("extract(day from content.field_birthdate) = " . date('j'))
            -&gt;andWhere("extract(month from content.field_birthdate) = " . date('n'))
            -&gt;group('siteUsers')
            -&gt;status('active')
            -&gt;all();