fix(users): restore WeChat template notification flow

src/Auth/WeixinGzh.php

@@ -90,6 +90,16 @@ final class WeixinGzh {
 		return false;
 	}
 
+	public function access_token(): string {
+		$config = self::settings();
+		$appid = trim((string) ($config['appid'] ?? ''));
+		$secret = trim((string) ($config['appsecret'] ?? ''));
+		if ($appid === '' || $secret === '') {
+			return '';
+		}
+		return $this->get_access_token($appid, $secret);
+	}
+
 	public function rest_qrcode_login(\WP_REST_Request $request) {
 		$limited = $this->rate_limit('qr-create', 12, MINUTE_IN_SECONDS, 2);
 		if ($limited) {