public static function field_apikey()
{
$key = '';
if (isset(self::$current_options['api_key'])) {
$key = self::$current_options['api_key'];
}
?>
<input type="text" name="bbsub_handler_options[api_key]"
id="bbsub_postmark_apikey" value="<?php
echo esc_attr($key);
?>
"
class="regular-text code" />
<p class="description">
<?php
_e("You'll need to create an API key on the Postmark site. Head to <a href='https://postmarkapp.com/servers'>your server</a>, then generate an API key under the credentials tab", 'falcon');
?>
</p>
<?php
}