# Authentication Mechanisms Authentication of Discovery Agents in the Discovery Server is performed using a Bearer Token, which is passed in the request headers. The Bearer Token is matched with the unique GUID of each instance of the Discovery Agent. For authenticating users of the Discovery Server web interface, authorization is done using a username-password pair. Upon re-login, a session cookie with a limited lifespan is used. --- # 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://docs.sherparpa.ru/en/sherpa-process-discovery/diagramma-razvertyvaniya/mekhanizmy-autentifikacii.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.