Function parseUnsubscribeToken
parseUnsubscribeToken( tokenString: undefined | string, options: TokenOptions,): Result< | "token_missing" | "token_invalid" | "token_expired" | "security_question_check_failed", { attendeeId: string; emailAddress: string; emailName: string },> Returns Result<
| "token_missing"
| "token_invalid"
| "token_expired"
| "security_question_check_failed",
{ attendeeId: string; emailAddress: string; emailName: string },
>