public static void Main()
string recipientFirstName = "John";
string recipientLastName = "Smith";
string recipientEmail = "showtime-contact@humbugmail.com";
string recipientPhone = "2028675309";
string recipientCompany = "Facebook";
int recipientMLSID = 15534;
string host = "https://identity.homesnap.com";
string returnUrl = "https://zeta.homesnap.com/account/sign-in";
string recipient1 = $"3|{recipientFirstName}|{recipientLastName}|{recipientEmail}|{recipientPhone}|{recipientMLSID}|{recipientCompany}";
byte[] recipient2 = System.Text.Encoding.UTF8.GetBytes(recipient1);
string r = Convert.ToBase64String(recipient2);
string url = $"{host}/RegisterWithEmail?email={recipientEmail}&r={HttpUtility.UrlEncode(r)}&returnUrl={HttpUtility.UrlEncode(returnUrl)}";