This node provides the authentication for all Azure OpenAI models. It allows you to select the credentials that contain a valid Azure OpenAI API key in their password field (the username is ignored). Credentials can be set on the workflow level or created inside the workflow e.g. with the Credentials Configuration node and fed into this node via flow variable.
To find your Azure OpenAI API key, navigate to your Azure OpenAI Resource on the Azure Portal and copy one of the keys and the endpoint from 'Resource Management - Keys and Endpoints'.