Implmented the EAN generation

ref #77

src/models/responses/ResponseRunnerCard.ts

@@ -42,7 +42,12 @@ export class ResponseRunnerCard {
         this.id = card.id;
         if (!card.runner) { this.runner = null }
         else { this.runner = card.runner.toResponse(); }
-        this.code = card.code;
+        try {
+            this.code = card.code;
+        } catch (error) {
+            this.code = "0000000000000"
+        }
+
         this.enabled = card.enabled;
     }
 }