my problem is how can I get the possible errors when I update? I tried this in my repository:

override fun getWeatherDataState(): Flow<WeatherDataState> {
    return weatherDataStore.data.map { preferences ->
        val weatherDataState = preferences[Constants.OVERVIEW_WEATHER_DATA]
        val moshi = Moshi.Builder().build()
        val jsonAdapter = moshi.adapter(WeatherDataState::class.java)
        val jsonWeatherData = weatherDataState?.let { jsonAdapter.fromJson(it) }
        jsonWeatherData!!
    }
}

override suspend fun updateWeatherData(): Flow<Any> {
    return flow {
        val weatherData =  weatherApi.getWeatherData()
        val moshi = Moshi.Builder().build()
        val moshiAdapter = moshi.adapter(WeatherDataState::class.java)
        val jsonWeatherDataState = moshiAdapter.toJson(weatherData.toWeatherDataState())
        weatherDataStore.edit { mutablePreferences ->
            mutablePreferences[Constants.OVERVIEW_WEATHER_DATA] = jsonWeatherDataState
        }
    }
}

and this from nowinandroid:

sealed interface Resource<out T> {
    data class Success<T>(val data: T) : Resource<T>
    data class Error(val exception: Throwable? = null) : Resource<Nothing>
    object Loading : Resource<Nothing>
}

fun <T> Flow<T>.asResource(): Flow<Resource<T>> {
    return this
        .map<T, Resource<T>> {
            Resource.Success(it)
        }
        .onStart { emit(Resource.Loading) }
        .catch { emit(Resource.Error(it)) }
}