// checked
$args = array(
'numberposts' => -1,
'post_type' => 'team',
'meta_query' => array(
array(
'key' => 'is_manager',
'value' => 1,
'compare' => '='
)
)
);
// not checked
$args = array(
'numberposts' => -1,
'post_type' => 'team',
'meta_query' => array(
array(
'key' => 'is_manager',
'value' => 0,
'compare' => '='
)
)
);