public override string ToString() {
StringBuilder sb = new StringBuilder("VerificationSessionData(");
sb.Append("SessionId: ");
sb.Append(SessionId);
sb.Append(",Method: ");
sb.Append(Method);
sb.Append(",Callback: ");
sb.Append(Callback);
sb.Append(",NormalizedPhone: ");
sb.Append(NormalizedPhone);
sb.Append(",CountryCode: ");
sb.Append(CountryCode);
sb.Append(",NationalSignificantNumber: ");
sb.Append(NationalSignificantNumber);
sb.Append(",AvailableVerificationMethods: ");
sb.Append(AvailableVerificationMethods);
sb.Append(")");
return sb.ToString();
}