trackTextOptIn

This event is triggered when a user opts in to text messaging.
Pass null for languageCode, unless the desired language is French then pass a String with value "fr".
A Wunderkind teammate will supply your accessCode.

Wunderkind.shared.trackTextOptIn(phoneNumber: String, accessKey: String, languageCode: String?)

Wunderkind.getInstance().trackTextOptIn(phoneNumber: String, accessKey: String, languageCode: String?)

Wunderkind().trackTextOptIn(String phoneNumber, String accessKey, String? languageCode)

Wunderkind.trackTextOptIn(phoneNumber: string, accessKey: string, languageCode?: string)