revert: Re-add finalizeSession function

frontend/src/API.js

@@ -130,6 +130,22 @@ export const getNextRound = async ({ session }) => {
     }
 };
 
+// Tell the backend that the session is finished
+export const finalizeSession = async ({ session, participant }) => {
+    try {
+        const response = await axios.post(
+            API_BASE_URL + URLS.session.finalize(session.current.id),
+            qs.stringify({
+                csrfmiddlewaretoken: participant.csrf_token,
+            })
+        );
+        return response.data;
+    } catch (err) {
+        console.error(err);
+        return null;
+    }
+}
+
 // Share participant
 export const shareParticipant = async ({ email, participant }) => {
     try {

frontend/src/components/Final/Final.js

@@ -5,6 +5,7 @@ import Rank from "../Rank/Rank";
 import Social from "../Social/Social";
 
 import { URLS } from "../../config";
+import { finalizeSession } from "../../API";
 import ParticipantLink from "../ParticipantLink/ParticipantLink";
 import UserFeedback from "../UserFeedback/UserFeedback";
 
@@ -45,6 +46,10 @@ const Final= ({ experiment, participant, session, score, final_text, action_text
         };
     }, [score, showScore]);
 
+    const finalize = () => {
+        finalizeSession({ session, participant });
+    }
+
     return (
         <div className="aha__final d-flex flex-column justify-content-center">
             {rank && (