I'm trying to run the following code on typescript (found on the official documentation): ``` import * as SibApiV3Sdk from '@sendinblue/client' const apiInstance = new SibApiV3Sdk.TransactionalEmailsApi(); const apiKey = apiInstance.authentications['apiKey']; apiKey.apiKey = process.env.SENDINBLUE_API_KEY!; ``` But I'm getting the error: `Property 'authentications' is protected and only accessible within class 'TransactionalEmailsApi' and its subclasses`. What am I doing wrong? Is this a bug?