[HTTP 401] Unable to create record: Authentication Error - invalid username

I am getting the same error with D9. SMS is successful with the CURL. When we try the same via the module, it is throwing the authorization error.

@nanny1979,

Please follow the installation instruction.

Installation

1. Drupal 8,9 & 10: Add the library via the composer composer require twilio/sdk
2. Visit 'admin/config/system/twilio' and enter your Twilio account SID, Auth Token, and Phone number found on the Twilio dashboard

shashank5563,

Still we are able to get this error "[HTTP 401] Unable to create record: Authentication Error - invalid username", if the Key → module is installed. In the Twilio Settings admin form (/admin/config/system/twilio), Twilio Account SID and Twilio authentication token information stored as a key. Due to this valid SID and Token not passed correctly via Twilio REST Client.

File: /twilio/src/Form/TwilioAdminForm.php
Line no: 94

    $key_exists = $this->moduleHandler->moduleExists('key');

    if ($key_exists) {
      $form['account'] = [
        '#type' => 'key_select',
        '#required' => TRUE,
        '#default_value' => $config->get('account'),
        '#title' => $this->t('Twilio Account SID'),
      ];
      $form['token'] = [
        '#type' => 'key_select',
        '#required' => TRUE,
        '#default_value' => $config->get('token'),
        '#title' => $this->t('Twilio authentication token'),
      ];
    }

Proposed solution: We should get the valid SID and Token from the selected keys.

@shashank5563,

Created a patch to get the Valid SID and token from the key configurations. Kindly validate from your end and confirm.

This patch resolved the issue

Reviewed the patch provided in #6 and I am able to test the SMS successfully as expected