one-time restore initial from async func.

example.ts

import { atom } from "jotai";
import AsyncStorage from "@react-native-community/async-storage";


const jwtTokenAtom = atom<string, string>("", (_, set, value) => {
  set(jwtTokenAtom, value);
  AsyncStorage.setItem("jwt_token", value);
});

jwtTokenAtom.onMount = (set) => {
  (async () => {
    const value = await AsyncStorage.getItem("jwt_token");
    if (value) {
      set(value);
    }
  })();
};