How to read from DataStore Preferences to string?

Im trying to use datastore inside Composable to read user data but cant read the value as string to put inside Text. That's the datastore

private val Context.userPreferencesDataStore: DataStore<Preferences> by preferencesDataStore(
  name = "user"
)
private val USER_FIRST_NAME = stringPreferencesKey("user_first_name")
suspend fun saveUserToPreferencesStore(context: Context) {
  context.userPreferencesDataStore.edit { preferences ->
    preferences[USER_FIRST_NAME] = "user1"
  }
}
fun getUserFromPreferencesStore(context: Context): Flow<String> = context.userPreferencesDataStore.data
  .map { preferences ->
    preferences[USER_FIRST_NAME] ?: ""
  }

and inside Composable:

@Composable
fun myComposable() {
  var context = LocalContext.current
  LaunchedEffect( true){
    saveUserToPreferencesStore(context )
  
  }
  Text(getUserFromPreferencesStore(context ))
}