How to use the docusign-esign.EnvelopesApi function in docusign-esign

// list of user account(s)
      // note that a given user may be a member of multiple accounts
      var loginAccounts = loginInfo.getLoginAccounts();
      console.log('LoginInformation: ' + JSON.stringify(loginAccounts));

      // ===============================================================================
      // Step 2:  List Recipients() API
      // ===============================================================================

      // use the |accountId| we retrieved through the Login API
      var loginAccount = new docusign.LoginAccount();
      loginAccount = loginAccounts[0];
      var accountId = loginAccount.accountId;

      // instantiate a new EnvelopesApi object
      var envelopesApi = new docusign.EnvelopesApi();

      // call the listRecipients() API
      envelopesApi.listRecipients(accountId, envelopeId, function (error, recips, response) {
        if (error) {
          console.log('Error: ' + error);
          return;
        }

        if (recips) {
          console.log('Recipients: ' + JSON.stringify(recips));
        }
      });
    }
  });
}; // end listRecipients()

// list of user account(s)
      // note that a given user may be a member of multiple accounts
      var loginAccounts = loginInfo.getLoginAccounts();
      console.log('LoginInformation: ' + JSON.stringify(loginAccounts));

      // ===============================================================================
      // Step 2:  Create ConsoleView API
      // ===============================================================================

      // use the |accountId| we retrieved through the Login API
      var loginAccount = new docusign.LoginAccount();
      loginAccount = loginAccounts[0];
      var accountId = loginAccount.accountId;

      // instantiate a new envelopesApi object
      var envelopesApi = new docusign.EnvelopesApi();

      // set the url where you want the user to go once they logout of the Console
      var returnUrl = new docusign.ConsoleViewRequest();
      returnUrl.setReturnUrl('https://www.docusign.com/devcenter');

      // call the createConsoleView() API
      envelopesApi.createConsoleView(accountId, returnUrl, function (error, consoleView, response) {
        if (error) {
          console.log('Error: ' + error);
          return;
        }

        if (consoleView) {
          console.log('ConsoleView: ' + JSON.stringify(consoleView));
        }
      });

}

        if (envelopeSummary) {
          envelopeId = envelopeSummary.envelopeId;
          console.log('EnvelopeSummary: ' + JSON.stringify(envelopeSummary));

          // ===============================================================================
          // Step 3:  Create RecipientView API
          // ===============================================================================
          // use the |accountId| we retrieved through the Login API
          var loginAccount = new docusign.LoginAccount();
          loginAccount = loginAccounts[0];
          var accountId = loginAccount.accountId;

          // instantiate a new EnvelopesApi object
          var envelopesApi = new docusign.EnvelopesApi();

          // set the url where you want the recipient to go once they are done signing
          var returnUrl = new docusign.RecipientViewRequest();
          returnUrl.setReturnUrl('https://www.docusign.com/devcenter');
          returnUrl.setAuthenticationMethod('email');

          // recipient information must match embedded recipient info we provided in step #2
          returnUrl.setEmail(signerEmail);
          returnUrl.setUserName(signerName);
          returnUrl.setRecipientId('1');
          returnUrl.setClientUserId('1001');

          // call the CreateRecipientView API
          envelopesApi.createRecipientView(accountId, envelopeId, returnUrl, function (error, recipientView, response) {
            if (error) {
              console.log('Error: ' + error);

// list of user account(s)
      // note that a given user may be a member of multiple accounts
      var loginAccounts = loginInfo.getLoginAccounts();
      console.log('LoginInformation: ' + JSON.stringify(loginAccounts));

      // ===============================================================================
      // Step 2:  Get Document API
      // ===============================================================================

      // use the |accountId| we retrieved through the Login API
      var loginAccount = new docusign.LoginAccount();
      loginAccount = loginAccounts[0];
      var accountId = loginAccount.accountId;

      // instantiate a new EnvelopesApi object
      var envelopesApi = new docusign.EnvelopesApi();

      // call the getDocument() API
      envelopesApi.getDocument(accountId, envelopeId, documentId, function (error, document, response) {
        if (error) {
          console.log('Error: ' + error);
          return;
        }

        if (document) {
          try {
            var fs = require('fs');
            var path = require('path');
            // download the document pdf
            var filename = accountId + '_' + envelopeId + '_' + documentId + '.pdf';
            var tempFile = path.resolve(__dirname, filename);
            fs.writeFile(tempFile, Buffer.from(document, 'binary'), function (err) {

// list of user account(s)
      // note that a given user may be a member of multiple accounts
      var loginAccounts = loginInfo.getLoginAccounts();
      console.log('LoginInformation: ' + JSON.stringify(loginAccounts));

      // ===============================================================================
      // Step 2:  List Envelope API
      // ===============================================================================

      // use the |accountId| we retrieved through the Login API
      var loginAccount = new docusign.LoginAccount();
      loginAccount = loginAccounts[0];
      var accountId = loginAccount.accountId;

      // instantiate a new EnvelopesApi object
      var envelopesApi = new docusign.EnvelopesApi();

      // the list status changes call requires at least a from_date
      var options = new envelopesApi.ListStatusChangesOptions();

      // set from date to filter envelopes (ex: Dec 1, 2015)
      options.setFromDate('2015/12/01');

      // call the listStatusChanges() API
      envelopesApi.listStatusChanges(accountId, options, function (error, envelopes, response) {
        if (error) {
          console.log('Error: ' + error);
          return;
        }

        if (envelopes) {
          console.log('EnvelopesInformation: ' + JSON.stringify(envelopes));

}

        if (envelopeSummary) {
          envelopeId = envelopeSummary.getEnvelopeId();
          console.log('EnvelopeSummary: ' + JSON.stringify(envelopeSummary));

          // ===============================================================================
          // Step 3:  Create SenderView API
          // ===============================================================================
          // use the |accountId| we retrieved through the Login API
          var loginAccount = new docusign.LoginAccount();
          loginAccount = loginAccounts[0];
          var accountId = loginAccount.accountId;

          // instantiate a new EnvelopesApi object
          var envelopesApi = new docusign.EnvelopesApi();

          // set the url where you want the sender to go once they are done editing/sending the envelope
          var returnUrl = new docusign.ReturnUrlRequest();
          returnUrl.setReturnUrl('https://www.docusign.com/devcenter');

          // call the createEnvelope() API
          envelopesApi.createSenderView(accountId, envelopeId, returnUrl, function (error, senderView, response) {
            if (error) {
              console.log('Error: ' + error);
              return;
            }

            if (senderView) {
              console.log('ViewUrl: ' + JSON.stringify(senderView));
            }
          });

// list of user account(s)
      // note that a given user may be a member of multiple accounts
      var loginAccounts = loginInfo.getLoginAccounts();
      console.log('LoginInformation: ' + JSON.stringify(loginAccounts));

      // ===============================================================================
      // Step 2:  Get Envelope API
      // ===============================================================================

      // use the |accountId| we retrieved through the Login API to access envelope info
      var loginAccount = new docusign.LoginAccount();
      loginAccount = loginAccounts[0];
      var accountId = loginAccount.accountId;

      // instantiate a new EnvelopesApi object
      var envelopesApi = new docusign.EnvelopesApi();

      // call the getEnvelope() API
      envelopesApi.getEnvelope(accountId, envelopeId, null, function (error, env, response) {
        if (error) {
          console.log('Error: ' + error);
          return;
        }

        if (env) {
          console.log('Envelope: ' + JSON.stringify(env));
        }
      });
    }
  });
}; // end GetEnvelopeInformation()

var templateRolesList = [];
      templateRolesList.push(tRole);

      // assign template role(s) to the envelope
      envDef.setTemplateRoles(templateRolesList);

      // send the envelope by setting |status| to "sent". To save as a draft set to "created"
      envDef.setStatus('sent');

      // use the |accountId| we retrieved through the Login API to create the Envelope
      var loginAccount = new docusign.LoginAccount();
      loginAccount = loginAccounts[0];
      var accountId = loginAccount.accountId;

      // instantiate a new EnvelopesApi object
      var envelopesApi = new docusign.EnvelopesApi();

      // call the createEnvelope() API
      envelopesApi.createEnvelope(accountId, envDef, null, function (error, envelopeSummary, response) {
        if (error) {
          console.log('Error: ' + error);
          return;
        }

        if (envelopeSummary) {
          console.log('EnvelopeSummary: ' + JSON.stringify(envelopeSummary));
        }
      });
    }
  });
}; // end RequestSignatureFromTemplate()