export async function registerForPushNotificationsAsync(token) {

  const { status: existingStatus } = await Permissions.getAsync(
    Permissions.NOTIFICATIONS
  );
  let finalStatus = existingStatus;

  // Only ask if permissions have not already been determined, for iOS.
  if (existingStatus !== 'granted') {
    const { status } = await Permissions.askAsync(Permissions.NOTIFICATIONS);
    finalStatus = status;
  }

  // Stop here if the user did not grant permissions
  if (finalStatus !== 'granted') {
    return;
  }

  // Get the push token that uniquely identifies this device
  let expoToken = await Notifications.getExpoPushTokenAsync();

  // Post new push token to backend for user
  return axios({
    method: 'POST',
    url: `${str.ROOT_URL}/account/push/`,
    headers: {
      Authorization: `Token ${token}`
    },
    data: {
      "token": expoToken,
      "status": finalStatus
    }
  });

}