refreshing ID token only after every 50 minutes or so because AWS tokens are valid for 60 minutes

[nyck33]

I am using your example code's UserService and store the tokens in local storage.
I am refactoring code that does this:

this.jwtToken = this._userService.getSession().getIdToken().getJwtToken();

on each request to AWS to put in the header.
But if the idToken is good for 60 minutes, I only want to call UserService.init() every 50 or 55 minutes or so to save time making requests (maybe multiple requests to different endpoints in a short span so don't want to call UserSerivce.init() each time) and to load pages faster on Flutter Web. Is it advisable to use a timer in Dart to do this?

[furaiev]

I wouldn't use a timer. I think you can decode the token before each request and check if it is still valid (valid - ok, not valid - refresh)