# Client SDK: Usage ## Credentials Authentication to the server requires a username and private key pair. Please obtain these credentials by reaching out to `engineering@bunkerhillhealth.com`. The private key should be stored securely, for example in a file named `private_key.pem`. The credentials are exchanged with the server for a JWT access token, which is managed by the Client SDK and automatically passed with all API requests. --- # 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.bunkerhillhealth.com/software/sdks/client-sdk/client-sdk-usage.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.