Use CreateContact with an AWS SDK

    /// <summary>
    /// Creates a contact and adds it to the specified contact list.
    /// </summary>
    /// <param name="emailAddress">The email address of the contact.</param>
    /// <param name="contactListName">The name of the contact list.</param>
    /// <returns>The response from the CreateContact operation.</returns>
    public async Task<bool> CreateContactAsync(string emailAddress, string contactListName)
    {
        var request = new CreateContactRequest
        {
            EmailAddress = emailAddress,
            ContactListName = contactListName
        };

        try
        {
            var response = await _sesClient.CreateContactAsync(request);
            return response.HttpStatusCode == HttpStatusCode.OK;
        }
        catch (AlreadyExistsException ex)
        {
            Console.WriteLine($"Contact with email address {emailAddress} already exists in the contact list {contactListName}.");
            Console.WriteLine(ex.Message);
            return true;
        }
        catch (NotFoundException ex)
        {
            Console.WriteLine($"The contact list {contactListName} does not exist.");
            Console.WriteLine(ex.Message);
        }
        catch (TooManyRequestsException ex)
        {
            Console.WriteLine("Too many requests were made. Please try again later.");
            Console.WriteLine(ex.Message);
        }
        catch (Exception ex)
        {
            Console.WriteLine($"An error occurred while creating the contact: {ex.Message}");
        }
        return false;
    }

      try {
        // Create a new contact with the provided email address in the
        CreateContactRequest contactRequest = CreateContactRequest.builder()
            .contactListName(CONTACT_LIST_NAME)
            .emailAddress(emailAddress)
            .build();

        sesClient.createContact(contactRequest);
        contacts.add(emailAddress);

        System.out.println("Contact created: " + emailAddress);

        // Send a welcome email to the new contact
        String welcomeHtml = Files.readString(Paths.get("resources/coupon_newsletter/welcome.html"));
        String welcomeText = Files.readString(Paths.get("resources/coupon_newsletter/welcome.txt"));

        SendEmailRequest welcomeEmailRequest = SendEmailRequest.builder()
            .fromEmailAddress(this.verifiedEmail)
            .destination(Destination.builder().toAddresses(emailAddress).build())
            .content(EmailContent.builder()
                .simple(
                    Message.builder()
                        .subject(Content.builder().data("Welcome to the Weekly Coupons Newsletter").build())
                        .body(Body.builder()
                            .text(Content.builder().data(welcomeText).build())
                            .html(Content.builder().data(welcomeHtml).build())
                            .build())
                        .build())
                .build())
            .build();
        SendEmailResponse welcomeEmailResponse = sesClient.sendEmail(welcomeEmailRequest);
        System.out.println("Welcome email sent: " + welcomeEmailResponse.messageId());
      } catch (AlreadyExistsException e) {
        // If the contact already exists, skip this step for that contact and proceed
        // with the next contact
        System.out.println("Contact already exists, skipping creation...");
      } catch (Exception e) {
        System.err.println("Error occurred while processing email address " + emailAddress + ": " + e.getMessage());
        throw e;
      }
    }

def main():
    """
    The main function that orchestrates the execution of the workflow.
    """
    print(INTRO)
    ses_client = boto3.client("sesv2")
    workflow = SESv2Workflow(ses_client)
    try:
        workflow.prepare_application()
        workflow.gather_subscriber_email_addresses()
        workflow.send_coupon_newsletter()
        workflow.monitor_and_review()
    except ClientError as e:
        print_error(e)
    workflow.clean_up()



class SESv2Workflow:
    """
    A class to manage the SES v2 Coupon Newsletter Workflow.
    """

    def __init__(self, ses_client, sleep=True):
        self.ses_client = ses_client
        self.sleep = sleep


            try:
                # Create a new contact
                self.ses_client.create_contact(
                    ContactListName=CONTACT_LIST_NAME, EmailAddress=email
                )
                print(f"Contact with email '{email}' created successfully.")

                # Send the welcome email
                self.ses_client.send_email(
                    FromEmailAddress=self.verified_email,
                    Destination={"ToAddresses": [email]},
                    Content={
                        "Simple": {
                            "Subject": {
                                "Data": "Welcome to the Weekly Coupons Newsletter"
                            },
                            "Body": {
                                "Text": {"Data": welcome_text},
                                "Html": {"Data": welcome_html},
                            },
                        }
                    },
                )
                print(f"Welcome email sent to '{email}'.")
                if self.sleep:
                    # 1 email per second in sandbox mode, remove in production.
                    sleep(1.1)
            except ClientError as e:
                # If the contact already exists, skip and proceed
                if e.response["Error"]["Code"] == "AlreadyExistsException":
                    print(f"Contact with email '{email}' already exists. Skipping...")
                else:
                    raise e

async fn add_contact(client: &Client, list: &str, email: &str) -> Result<(), Error> {
    client
        .create_contact()
        .contact_list_name(list)
        .email_address(email)
        .send()
        .await?;

    println!("Created contact");

    Ok(())
}