Ready to implement sync function on ESP32 device

esp32_device/main/secure_api.c

@@ -192,4 +192,10 @@ char *secure_api_get_dev_certificate()
     }
 
     return res;
+}
+
+void *secure_api_sync_device()
+{
+    printf("here implement sync device logic\n");
+    return NULL;
 }