Client Creation does not Apply Supplied API Key to ApiKey Header

[ronaldroe]

🐛 Bug report

This is my client declaration:

const client = new Client(
    {
      node: '***',
      auth: {
        apiKey: {
          api_key: '***',
          id: '***'
        }
      },
      requestTimeout: 120000,
      maxRetries: 10
    }
  );

Request header has no API key in that header:

header: {
          'WWW-Authenticate': [
            'Basic realm="security" charset="UTF-8"',
            'Bearer realm="security"',
            'ApiKey'
          ]
        }

Error output:

root_cause: [
          {
            type: 'security_exception',
            reason: 'missing authentication credentials for REST request [//_search]',
            header: [Object]
          }
        ]

I created the key and copied it directly. I've tried both with and without the id. The key never gets added to the header for some reason, and I didn't find anything about it in the docs other than the structure above, which I pasted directly from the docs. I get the same error when I try username/password

To reproduce

Use an input with what the docs show is a properly formed ApiKey

Expected behavior

The api key authenticates the user

Node.js version

20.12

@elastic/elasticsearch version

6.3

Operating system

MacOS

Any other relevant environment information

No response

[JoshMock]

@ronaldroe As far as I'm aware, there is no Elasticsearch client with version 6.3, even in the old client that was deprecated a few years ago. Could you verify what version you are actually using?