Signer authentication: five ways to confirm who is signing

var apiClient = new ApiClient("https://api.boldsign.com", "{Your API key}");
var documentClient = new DocumentClient(apiClient);
var documentFilePath = new DocumentFilePath
{
    ContentType = "application/pdf",
    FilePath = "{Your File path}"
};
var filesToUpload = new List<IDocumentFile>
{
    documentFilePath,
};
var signatureField = new FormField(
   id: "sign",
   isRequired: true,
   type:FieldType.Signature,
   pageNumber: 1,
   bounds: new Rectangle(x: 100, y: 100, width: 100, height: 50));
var formFieldCollections = new List<FormField>()
{
    signatureField
};
var signer = new DocumentSigner(
    signerName: "hanky",
    signerEmail: "hankyWhites@gmail.com",
    formFields: formFieldCollections,
    authenticationType: AuthenticationType.EmailOTP,
    locale: Locales.EN);
var documentSigners = new List<DocumentSigner>()
{
    signer
};
var sendForSign = new SendForSign()
{
    Signers = documentSigners,
    Files = filesToUpload
};
var documentCreated = documentClient.SendDocument(sendForSign);
Console.WriteLine(documentCreated.DocumentId);

import boldsign
configuration = boldsign.Configuration(host = "https://api.boldsign.com", api_key = "YOUR_API_KEY")
with boldsign.ApiClient(configuration) as api_client:
    document_api = boldsign.DocumentApi(api_client)
    send_for_sign = boldsign.SendForSign(
        title = "Document SDK API",
        document_title = "SDK Document Test case",
        description = "Testing document from SDK integration test case",
        files = ["YOUR_FILE_PATH"],
        signers = [
            boldsign.DocumentSigner(
                name = "Hanky",
                emailAddress = "hankyWhites@cubeflakes.com",
                signerOrder = 1,
                signerType = "Signer",
                authenticationType = "EmailOTP",
                formFields = [
                    boldsign.FormField(
                        name = "Sign",
                        fieldType = "Signature",
                        font = "Helvetica",
                        pageNumber = 1,
                        isRequired = True,
                        bounds = boldsign.Rectangle(x = 50, y = 50, width = 100, height = 150)
                    )
                ],
                privateMessage = "This is private message for signer"
            )
        ]
    )
    document_created = document_api.send_document(send_for_sign)

<?php require_once "vendor/autoload.php";
use BoldSign\Configuration;
use BoldSign\Api\DocumentApi;
use BoldSign\Model\{FormField, Rectangle, DocumentSigner, SendForSign, DocumentInfo, FileInfo};
$config = new Configuration();
$config->setHost("https://api.boldsign.com");
$config->setApiKey('YOUR_API_KEY');
$document_api = new DocumentApi($config);
$form_field = new FormField();
$form_field->setName('Sign');
$form_field->setFieldType('Signature');
$form_field->setPageNumber(1);
$form_field->setFont('Helvetica');
$form_field->setIsRequired(true);
$bounds = new Rectangle([50, 50, 100, 150]);
$form_field->setBounds($bounds);
$document_signer = new DocumentSigner();
$document_signer->setName('Hanky');
$document_signer->setEmailAddress('hankyWhites@cubeflakes.com');
$document_signer->setSignerType('Signer');
$document_signer->setSignerOrder(1);
$document_signer->setFormFields([$form_field]);
$document_signer->setAuthenticationType('EmailOTP');
$document_signer->setPrivateMessage('This is private message for signer');
$send_for_sign = new SendForSign();
$documentInfo = new DocumentInfo();
$documentInfo->setTitle('Document SDK API');
$documentInfo->setDescription('Testing document from SDK integration test case');
$send_for_sign->setDocumentInfo([$documentInfo]);
$files = new FileInfo();
$files = 'YOUR_FILE_PATH';
$send_for_sign->setFiles([$files]);
$send_for_sign->setTitle('SDK Document Test case');
$send_for_sign->setSigners([$document_signer]);
$document_created = $document_api->sendDocument($send_for_sign);

ApiClient client = Configuration.getDefaultApiClient();
client.setBasePath("https://api.boldsign.com");
client.setApiKey("YOUR_API_KEY");
DocumentApi documentApi = new DocumentApi(client);
FormField formField = new FormField();
formField.setName("Sign");
formField.setFieldType(FormField.FieldTypeEnum.SIGNATURE);
formField.setPageNumber(1);
formField.setFont(FormField.FontEnum.HELVETICA);
formField.setIsRequired(true);
Rectangle bounds = new Rectangle().x(100f).y(100f).width(100f).height(50f);
formField.setBounds(bounds);
DocumentSigner signer = new DocumentSigner();
signer.setName("Hanky");
signer.setEmailAddress("hankyWhites@cubeflakes.com");
signer.setSignerOrder(1);
signer.setSignerType(DocumentSigner.SignerTypeEnum.SIGNER);
signer.setFormFields(Arrays.asList(formField));
signer.setAuthenticationType(DocumentSigner.AuthenticationTypeEnum.EMAIL_OTP);
signer.setPrivateMessage("This is private message for signer");
SendForSign sendForSign = new SendForSign();
File file = new File("YOUR_FILE_PATH");
sendForSign.setFiles(Arrays.asList(file));
sendForSign.setSigners(Arrays.asList(signer));
sendForSign.setTitle("Document SDK API");
DocumentCreated documentCreated = documentApi.sendDocument(sendForSign);

import { DocumentApi, DocumentSigner, DocumentInfo, FormField, Rectangle, SendForSign } from "boldsign";
import * as fs from 'fs';
const documentApi = new DocumentApi("https://api.boldsign.com");
documentApi.setApiKey("YOUR_API_KEY");
const bounds = new Rectangle();
bounds.x = 100;
bounds.y = 50;
bounds.width = 100;
bounds.height = 100;
const formField = new FormField();
formField.name = "Sign";
formField.fieldType = FormField.FieldTypeEnum.Signature;
formField.font = FormField.FontEnum.Helvetica;
formField.pageNumber = 1;
formField.isRequired = true;
formField.bounds = bounds;
const documentSigner = new DocumentSigner();
documentSigner.name = "David";
documentSigner.emailAddress = "david@cubeflakes.com";
documentSigner.signerOrder = 1;
documentSigner.signerType = DocumentSigner.SignerTypeEnum.Signer;
documentSigner.formFields = [formField];
documentSigner.authenticationType =  DocumentSigner.AuthenticationTypeEnum.EmailOtp;
documentSigner.privateMessage = "This is private message for signer";
const files = fs.createReadStream("YOUR_FILE_PATH");
const sendForSign = new SendForSign();
const documentInfo = new DocumentInfo();
documentInfo.title = "SDK Document Test case";
documentInfo.description = "Testing document from SDK integration test case";
sendForSign.documentInfo = [documentInfo];
sendForSign.title = "Document SDK API";
sendForSign.signers = [documentSigner];
sendForSign.files = [files];
const documentCreated = documentApi.sendDocument(sendForSign);