[BUG]: AtomWithStorage should not return initialvalue

[Pszz]

Summary

// When the user is not logged in, I set his sign to empty
const UserSign = atomWithStorage<string | null>('user_sign', null)

// hooks
const useLogin = () => { 
   const [sign, setSign] = useAtom(UserSign)
   console.log('sign::', sign)
   
   const login = async () => {
      await getUserToken()
      setSign('user sign token')
   }  
  
   useEffect(() => {
    // It always triggers the first time. 
    // In my opinion, when there is no content in storage, 
    // it has an initial value, and when there is content, the initial value should not be returned.

     if(sign === null) {
       login()
   }

}, [sign])
}

Other

1. initialValue in atomWithStorage should not be required.
2. The third parameter is not required either.
3. I can't get around the second point when I only need to modify getOnInit:true in options.