get location subscription in expo

import * as Location from 'expo-location';
let watchPositionRemove;
  removeLocationSubscription() {
    if (watchPositionRemove) {
      console.log("watchPositionRemove._W.remove() ");
      watchPositionRemove._W.remove();
    }
  }
  getLocationAsync = async () => {
    console.log("getLocationAsync() ", this._isMounted, watchPositionRemove);
    if (!this._isMounted) return;
    console.log("working");
    let { status } = await Location.requestForegroundPermissionsAsync();
    if (status !== 'granted') {
      console.log('Permission to access location was denied');
    }
    //write code for the app to handle GPS changes
    watchPositionRemove = Location.watchPositionAsync({
      accuracy: Location.Accuracy.BestForNavigation,
      timeInterval: 1000, distanceInterval: 1
    }, (location) => {
      console.log("OS sent Location ");
      const { latitude, longitude } = location.coords
      this.getStation0FromLocation(latitude, longitude)
    });
  };