Do not print on stdout, use arg and write file instead

This ensures we don't put errors inside devices.json file.

hc-login.py

@@ -38,6 +38,7 @@ def debug(*args):
 
 email = sys.argv[1]
 password = sys.argv[2]
+devicefile = sys.argv[3]
 
 headers = {"User-Agent": "hc-login/1.0"}
 
@@ -313,4 +314,5 @@ for app in account["data"]["homeAppliances"]:
     config["description"] = machine["description"]
     config["features"] = augment_device_features(machine["features"])
 
-print(json.dumps(configs, indent=4))
+with open(devicefile, 'w') as f:
+    json.dump(configs, f, ensure_ascii=True, indent=4)