Added auth cache support

src/vpn_manager_globalprotect/backend.py

@@ -24,6 +24,7 @@ import base64
 import re
 import psutil
 import signal
+from datetime import timedelta
 
 
 class LoginTarget(StrEnum):
@@ -85,6 +86,13 @@ class GlobalProtectConnection(
 
     logger = logging.getLogger(f"{__name__}.GlobalProtectConnection")
 
+    def get_auth_cache_timeout(self, options: dict[str, Variant]) -> timedelta | None:
+        """Get the timeout for the authdata cache."""
+        timeout = options.get("auth_cache_timeout")
+        if timeout is None:
+            return None
+        return timedelta(seconds=timeout.value)
+
     async def _prelogin(self, options: dict[str, Variant]):
         """Perform prelogin request."""