How to get an access_token with a longer lifetime?

Question

Classmates

I am developing a hybrid game. That is, written on a web platform, then ported to mobile platforms. The problem is that during initialization, an access_token is issued with a lifetime of 1800 seconds (30 minutes).
That is, if the player enters the game the next day, he will have to go through authorization again.
In cases with Facebook, it issues a token for a month. Therefore, the question arises, how to get an access_token with a longer lifetime, let's say a month?

Answer 1

Try clicking at the bottom under your application on "Change application settings"
Then on Eternal access_token