Please Note – First, you need to enable Maps SDK for iOS, Maps Static API, and Places API, Place SDK for iOS,Geocoding API,Geolocation API and Distance Matrix API then you need to enable Directions API. For enabling APIs, follow the same process as shown below for Directions API
Step 9 : Click on Enable
Step 10 : Click on Credentials
Step 11 : Click on Create Credentials
Step 12 : Create Credentials dropdown menu will open, select API key
Step 13 : Click on Restrict Key
Step 14 : Select None in Application Restrictions, and then click on Save button
Step 15 : Here is your API key. Copy it
Step 16 : Now paste the copied API key in My Apps >> Taxi >> Settings >> Map Settings >> Google API Key for IOS field, and click on Save & Next button