Token expired

[Richou]

1. The merchant installed our APP from shopify, after placing an order, the order cannot be synchronized on our APP
Our developers found that it was due to token expiration.

2. I tried uninstalling and reinstalling, and found that the binding was not undone after uninstalling. When I logged in to the APP after reinstalling, I was prompted to repeat the binding.

3. What should be done?