Update flask/app.py

flask/app.py

@@ -41,6 +41,7 @@ def activate_sdk():
         ret = init_sdk(dict_path.encode('utf-8'), online_key.encode('utf-8'))
 
     if ret == 0:
+        print_info(f"FR_LICENSE_KEY: {online_key}")
         print_log("Successfully online init SDK!")
     else:
         print_error(f"Failed to online init SDK, Error code {ret}\n Trying offline init SDK...");