Google Sign-In Swift Sample App

CocoaPods

In the ../Samples/Swift/DaysUntilBirthday/ folder, run the following CocoaPods command.
```
pod install
```

Open the generated workspace:

open DaysUntilBirthdayForPod.xcworkspace

Run the DaysUntilBirthdayForPod target.

Swift Package Manager

In the ../Samples/Swift/DaysUntilBirthday/ folder, open the project:
```
open DaysUntilBirthday.xcodeproj
```
Run the DaysUntilBirthday target.