Refactor get/add workouts for user endpoint, and update message on completion of workout

templates/new_workout.html

@@ -215,17 +215,17 @@
                 // Disconnect from heart rate sensor
                 disconnectHeartRateMonitor();
 
-                fetch("{{ url_for('workouts', user_id=user.id) }}", {
+                fetch("{{ url_for('create_workout', user_id=user.id) }}", {
                     method: "POST",
                     headers: {
                         Accept: "application/json",
                         "Content-Type": "application/json",
                     },
                     body: JSON.stringify({ cadence_readings: workoutData, heart_rate_readings: heartRateData }),
-                }).then(res => res.json())
-                    .then(res => {
+                }).then(res => res.text())
+                    .then(txt => {
                         workoutData = [];
-                        swal("Submitted", JSON.stringify(res), "success");
+                        swal("Submitted", txt, "success");
                     })
                     .catch(err => swal("Failed to submit workout", err.message, "error"));