fix: verify keys exist before using them in override (#198)

Author: firstof9

openevsehttp/__main__.py

@@ -370,7 +370,8 @@ async def toggle_override(self) -> None:
         elif self._version_check(upper):
             _LOGGER.debug("Checking override status.")
             override = await self.get_override()
-            if override["state"] == "active":
+            _LOGGER.debug("Override status: %s", override)
+            if "state" in override and override["state"] == "active":
                 _LOGGER.debug("Disabling override.")
                 result = await self.set_override("disabled")
                 _LOGGER.debug("Disable response: %s", result)