Use authentication.file to set secrets file

src/zino/api/legacy.py

@@ -16,7 +16,7 @@
 from zino import version
 from zino.api import auth
 from zino.api.notify import Zino1NotificationProtocol
-from zino.state import ZinoState
+from zino.state import ZinoState, config
 from zino.statemodels import ClosedEventError, Event, EventState
 
 if TYPE_CHECKING:
@@ -38,7 +38,7 @@ def __init__(
         self,
         server: Optional["ZinoServer"] = None,
         state: Optional[ZinoState] = None,
-        secrets_file: Optional[Union[Path, str]] = "secrets",
+        secrets_file: Optional[Union[Path, str]] = None,
     ):
         """Initializes a protocol instance.
 
@@ -58,7 +58,7 @@ def __init__(
         self._authentication_challenge: Optional[str] = None
 
         self._state = state if state is not None else ZinoState()
-        self._secrets_file = secrets_file
+        self._secrets_file = secrets_file or config.authentication.file
 
     @property
     def peer_name(self) -> Optional[str]: