Check for data before on sensor state update

custom_components/fpl/DailyUsageSensor.py

@@ -7,10 +7,25 @@ class FplDailyUsageSensor(FplSensor):
 
     @property
     def state(self):
-        return self.data["daily_usage"][-1]["cost"]
+        try:
+            if "daily_usage" in self.data:
+                if len(self.data["daily_usage"]) > 0:
+                    if "cost" in self.data["daily_usage"][-1]:
+                        self._state = self.data["daily_usage"][-1]["cost"]
+        except:
+            pass
+
+        return self._state
 
     @property
     def device_state_attributes(self):
         """Return the state attributes."""
-        self.attr["date"] = self.data["daily_usage"][-1]["date"]
+        try:
+            if "daily_usage" in self.data:
+                if len(self.data["daily_usage"]) > 0:
+                    if "date" in self.data["daily_usage"][-1]:
+                        self.attr["date"] = self.data["daily_usage"][-1]["date"]
+        except:
+            pass
+
         return self.attr