configure method
Configures the Offerwall SDK with the provided apiKey.
This method can also take optional parameters:
subId: An optional subscription ID for tracking.userId: An optional user ID; if not provided, the SDK will generate one.
Throws an UnimplementedError if the platform-specific implementation has not been provided.
Implementation
Future<void> configure(String apiKey, {String? subId, String? userId}) {
throw UnimplementedError('configure() has not been implemented.');
}