Function get_service_auth 

pub(crate) async fn get_service_auth(
    __arg0: State<AppState>,
    headers: HeaderMap,
    query: Result<Query<ServiceAuthQuery>, QueryRejection>,
) -> Response

GET /xrpc/com.atproto.server.getServiceAuth

A service-auth token signed as the caller’s account, for aud. It issues a credential, so the e-stop’s issuance gate refuses it under either setting.