it is very confusing to log in to Mini Program. I want to make a request to the backend to get token, when logging in. The login here is authorized login, that is, if you call getUserInfo, you can return iv,encryptedData and send it to the backend together with wx.login "s code. Is it reasonable to get token in this way? A single code of login can return token. If the user has authorized this Mini Program, will the authorization status be retained all the time, for example, when my token expires, do I need to redirect to the authorization page to get the iv,encryptedData? (because there seems to be a certain period of time to keep it in setStorage)