Implementing Google Directions API

[susanzh4ng]

Instructions
The Directions API we are using a is Google API (pay-per-use), so sign up for the Google Cloud Free Trial to use it for free for 90 days. Please refer to the following video to learn how to use it with React Native.

• Sign up for the Google Cloud Free Trial here
• Google Maps Directions API Documentation
• Google Maps and Directions API on React Native