Display total calories for each workout

app.py

@@ -232,12 +232,14 @@ def get_workouts_for_user(user_id):
             duration = end_time - start_time
             average_rpm = sum(
                 reading.rpm for reading in cadence_readings) / len(cadence_readings)
+            calories = cadence_readings[-1].calories
             workouts_data.append({
                 'id': workout.id,
                 'user_id': user_id,
                 'start_time': format_date_with_ordinal(start_time, '%#H:%M %B %dth %Y'),
                 'duration': format_duration(duration),
-                'average_rpm': int(average_rpm)
+                'average_rpm': int(average_rpm),
+                'calories': calories,
             })
     return workouts_data