How to get the last Inserted ID after insert data using the query builder ?

Hello !

Does anyone knows how to get the last Inserted ID after insert data using the query builder class?

In CI 3 I just used:

PHP Code:

$this->db->insert_id(); 


What would be the equivalent in CI 4 ?

PHP Code:

    public function insertNewCandidate($candidate) {

        $db      = \Config\Database::connect();
        $builder = $db->table('dados_candidates');
        
        $query = $builder->insert($candidate);

        if( $query ):
            
            return ?????????????;
            
        else: 

            return FALSE;
            
        endif;
        
    } 


And YES, I do want to use query builder for this... 

I tried to find it in $db, $builder and $query... But it is not there....