Account Linking
In order to implement the Linking API using the SDK, the developer must extend the controller class AccountLinkingController and implement one abstract method: GetUserId.
/// <summary>
/// Processes getUserId requests.
/// </summary>
/// <returns>A <see cref="Task{T}"/> of <see cref="GetUserIdResponse"/></returns>
protected override Task<GetUserIdResponse> GetUserId(GetUserIdRequest request);