# Authentication Node Authentication node is used to define authentication to be used by successive API request nodes. Currently we support basic authentication using `Username` and `Password` but we plan to add more types of authentication. Authentication is global during graph run, once you define an authentication, all successive request nodes will use that, you can add as many authentication nodes in the same graph to define different set of authentication parameters. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://flowtestai.gitbook.io/flowtestai/flow-nodes/authentication-node.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.