login method
Login using the given phone
number.
To complete the login flow, call PendingOtpVerification.verify with the code that was sent to the user.
Returns a PendingOtpVerification.
Implementation
Future<PendingOtpVerification> login(
String phone, {
Map<String, dynamic> parameters = const <String, dynamic>{},
}) {
throw UnimplementedError('login() is not implemented.');
}