diff --git a/app/(api)/_datalib/userToEvent/createUserToEvent.ts b/app/(api)/_datalib/userToEvent/createUserToEvent.ts
new file mode 100644
index 00000000..cfe7e85b
--- /dev/null
+++ b/app/(api)/_datalib/userToEvent/createUserToEvent.ts
@@ -0,0 +1,53 @@
+import { NextResponse } from 'next/server';
+import { getDatabase } from '@utils/mongodb/mongoClient.mjs';
+import isBodyEmpty from '@utils/request/isBodyEmpty';
+import parseAndReplace from '@utils/request/parseAndReplace';
+import { NoContentError, HttpError } from '@utils/response/Errors';
+
+export async function createUserToEvent(body: object) {
+  try {
+    console.log('Received body:', body);
+
+    if (isBodyEmpty(body)) {
+      console.log('Body is empty');
+      throw new NoContentError();
+    }
+
+    const db = await getDatabase();
+    console.log('Connected to database');
+
+    const parsedBody = await parseAndReplace(body);
+    console.log('Parsed body:', parsedBody);
+
+    const currentDate = new Date().toISOString();
+    const creationStatus = await db.collection('user_to_event').insertOne({
+      ...parsedBody,
+      _last_modified: currentDate,
+      _created_at: currentDate,
+    });
+    console.log('Creation status:', creationStatus);
+
+    const createdAssociation = await db.collection('user_to_event').findOne({
+      _id: creationStatus.insertedId,
+    });
+    console.log('Created association:', createdAssociation);
+
+    if (!createdAssociation) {
+      console.log('Created association not found');
+      throw new HttpError('Failed to fetch the created association');
+    }
+
+    // Returning a NextResponse directly
+    return NextResponse.json(
+      { ok: true, body: createdAssociation, error: null },
+      { status: 201 }
+    );
+  } catch (e) {
+    const error = e as HttpError;
+    console.log('Error:', error.message);
+    return NextResponse.json(
+      { ok: false, body: null, error: error.message },
+      { status: error.status || 400 }
+    );
+  }
+}
diff --git a/app/(api)/_datalib/userToEvent/deleteUserToEvent.ts b/app/(api)/_datalib/userToEvent/deleteUserToEvent.ts
new file mode 100644
index 00000000..5fd5bc50
--- /dev/null
+++ b/app/(api)/_datalib/userToEvent/deleteUserToEvent.ts
@@ -0,0 +1,53 @@
+// DeleteUserToEvent function
+import { NextResponse } from 'next/server';
+import { ObjectId } from 'mongodb';
+import { getDatabase } from '@utils/mongodb/mongoClient.mjs';
+import NotFoundError from '@utils/response/NotFoundError';
+import HttpError from '@utils/response/HttpError';
+
+export const DeleteUserToEvent = async (id: string) => {
+  try {
+    const db = await getDatabase();
+    const object_id = new ObjectId(id);
+
+    // TESTING PURPOSES: Log query to see its structure + DELETE LATER
+    console.log('Query being used for deletion:', id);
+
+    // Perform delete operation based on the query object
+    const deleteStatus = await db
+      .collection('user_to_event')
+      .deleteOne({ _id: object_id });
+
+    const findStatus = await db
+      .collection('user_to_event')
+      .findOne({ _id: object_id });
+
+    console.log('FOUND', findStatus);
+
+    // TESTING PURPOSES: delete later
+    console.log(deleteStatus);
+
+    // If no documents matched the query, return a not-found message
+    if (deleteStatus.deletedCount === 0) {
+      throw new NotFoundError(
+        `No matching associations found for the provided query.`
+      );
+    }
+
+    // Confirmation response of deleted count
+    return NextResponse.json(
+      {
+        ok: true,
+        body: `${deleteStatus.deletedCount} association(s) deleted.`,
+        error: null,
+      },
+      { status: 200 }
+    );
+  } catch (e) {
+    const error = e as HttpError;
+    return NextResponse.json(
+      { ok: false, body: null, error: error.message },
+      { status: error.status || 400 }
+    );
+  }
+};
diff --git a/app/(api)/_datalib/userToEvent/getUserToEvent.ts b/app/(api)/_datalib/userToEvent/getUserToEvent.ts
new file mode 100644
index 00000000..b8a360a0
--- /dev/null
+++ b/app/(api)/_datalib/userToEvent/getUserToEvent.ts
@@ -0,0 +1,46 @@
+// GetUserToEvent.ts
+import { NextResponse } from 'next/server';
+import { getDatabase } from '@utils/mongodb/mongoClient.mjs';
+import { HttpError } from '@utils/response/Errors';
+
+export const GetUserToEvent = async (query: object = {}) => {
+  try {
+    const db = await getDatabase();
+
+    const userEvents = await db
+      .collection('user_to_event')
+      .aggregate([
+        {
+          $match: query,
+        },
+        {
+          $lookup: {
+            from: 'events',
+            localField: 'event_id',
+            foreignField: '_id',
+            as: 'events',
+          },
+        },
+        {
+          $lookup: {
+            from: 'users',
+            localField: 'user_id',
+            foreignField: '_id',
+            as: 'users',
+          },
+        },
+      ])
+      .toArray();
+
+    return NextResponse.json(
+      { ok: true, body: userEvents, error: null },
+      { status: 200 }
+    );
+  } catch (e) {
+    const error = e as HttpError;
+    return NextResponse.json(
+      { ok: false, body: null, error: error.message },
+      { status: error.status || 400 }
+    );
+  }
+};
diff --git a/app/(api)/_datalib/userToEvent/updateUserToEvent.ts b/app/(api)/_datalib/userToEvent/updateUserToEvent.ts
new file mode 100644
index 00000000..d519a497
--- /dev/null
+++ b/app/(api)/_datalib/userToEvent/updateUserToEvent.ts
@@ -0,0 +1,66 @@
+import { NextResponse } from 'next/server';
+import { getDatabase } from '@utils/mongodb/mongoClient.mjs';
+import { ObjectId } from 'mongodb';
+import isBodyEmpty from '@utils/request/isBodyEmpty';
+import parseAndReplace from '@utils/request/parseAndReplace';
+import {
+  HttpError,
+  NoContentError,
+  NotFoundError,
+} from '@utils/response/Errors';
+
+export const updateUserToEvent = async (
+  userId: string,
+  eventId: string,
+  body: object
+) => {
+  try {
+    // FOR TESTING ONLY delete later
+    console.log('Received userId:', userId);
+    console.log('Received eventId:', eventId);
+    console.log('Received body for update:', body);
+
+    const user_id = new ObjectId(userId);
+    const event_id = new ObjectId(eventId);
+
+    // Check if the body is empty
+    if (isBodyEmpty(body)) {
+      throw new NoContentError();
+    }
+
+    const parsedBody = await parseAndReplace(body);
+    const db = await getDatabase();
+
+    // Update user details if the user ID is provided
+    const userUpdateResult = await db
+      .collection('users')
+      .updateOne({ _id: user_id }, { $set: parsedBody });
+
+    // Update event details if the event ID is provided
+    const eventUpdateResult = await db
+      .collection('events')
+      .updateOne({ _id: event_id }, { $set: parsedBody });
+
+    // Check if either the user or event was updated
+    const userUpdated = userUpdateResult.modifiedCount > 0;
+    const eventUpdated = eventUpdateResult.modifiedCount > 0;
+
+    if (!userUpdated && !eventUpdated) {
+      throw new NotFoundError(
+        `No user with id: ${userId} or event with id: ${eventId} found.`
+      );
+    }
+
+    // Success response
+    return NextResponse.json(
+      { ok: true, userUpdated, eventUpdated, error: null },
+      { status: 200 }
+    );
+  } catch (e) {
+    const error = e as HttpError;
+    return NextResponse.json(
+      { ok: false, body: null, error: error.message },
+      { status: error.status || 400 }
+    );
+  }
+};
diff --git a/app/(api)/api/user-to-event/[id]/delete.ts b/app/(api)/api/user-to-event/[id]/delete.ts
new file mode 100644
index 00000000..0ebec6fc
--- /dev/null
+++ b/app/(api)/api/user-to-event/[id]/delete.ts
@@ -0,0 +1,11 @@
+// DELETE handler
+import { NextRequest } from 'next/server';
+import { DeleteUserToEvent } from '@datalib/userToEvent/deleteUserToEvent';
+
+export async function DELETE(
+  _: NextRequest,
+  { params }: { params: { id: string } }
+) {
+  // Return the response from DeleteUserToEvent
+  return DeleteUserToEvent(params.id);
+}
diff --git a/app/(api)/api/user-to-event/[id]/get.ts b/app/(api)/api/user-to-event/[id]/get.ts
new file mode 100644
index 00000000..0e90b52f
--- /dev/null
+++ b/app/(api)/api/user-to-event/[id]/get.ts
@@ -0,0 +1,29 @@
+// app/api/userToEvent/[id]/route.ts
+import { NextRequest, NextResponse } from 'next/server';
+import { GetUserToEvent } from '@datalib/userToEvent/getUserToEvent';
+
+export async function GET(
+  req: NextRequest,
+  { params }: { params: { id: string } }
+) {
+  const { id } = params;
+  const idType = req.headers.get('idType') || 'user_id'; // Default to "user_id" if no header is provided
+
+  // Validate idType to ensure it's either 'user_id' or 'event_id'
+  if (idType !== 'user_id' && idType !== 'event_id') {
+    return NextResponse.json(
+      {
+        ok: false,
+        body: null,
+        error: 'Invalid idType provided. Use "user_id" or "event_id".',
+      },
+      { status: 400 }
+    );
+  }
+
+  const result = await GetUserToEvent({
+    id,
+    idType: idType as 'user_id' | 'event_id',
+  });
+  return result;
+}
diff --git a/app/(api)/api/user-to-event/[id]/put.ts b/app/(api)/api/user-to-event/[id]/put.ts
new file mode 100644
index 00000000..c73e4aa6
--- /dev/null
+++ b/app/(api)/api/user-to-event/[id]/put.ts
@@ -0,0 +1,11 @@
+import { NextRequest } from 'next/server';
+import { updateUserToEvent } from '@datalib/userToEvent/updateUserToEvent';
+
+export async function PUT(
+  request: NextRequest,
+  { params }: { params: { userId: string; eventId: string } }
+) {
+  const { userId, eventId } = params;
+  const body = await request.json();
+  return updateUserToEvent(userId, eventId, body);
+}
diff --git a/app/(api)/api/user-to-event/[id]/route.ts b/app/(api)/api/user-to-event/[id]/route.ts
new file mode 100644
index 00000000..2cf8c447
--- /dev/null
+++ b/app/(api)/api/user-to-event/[id]/route.ts
@@ -0,0 +1,10 @@
+import authenticated from '@utils/authentication/authenticated';
+import { PUT as put } from './put';
+import { GET as get } from './get';
+import { DELETE as del } from './delete';
+
+const PUT = authenticated(put);
+const GET = authenticated(get);
+const DELETE = authenticated(del);
+
+export { PUT, GET, DELETE };
diff --git a/app/(api)/api/user-to-event/get.ts b/app/(api)/api/user-to-event/get.ts
new file mode 100644
index 00000000..55055636
--- /dev/null
+++ b/app/(api)/api/user-to-event/get.ts
@@ -0,0 +1,8 @@
+import { NextRequest } from 'next/server';
+import getQueries from '@utils/request/getQueries';
+import { GetUserToEvent } from '@datalib/userToEvent/getUserToEvent'; // Adjust the import path as needed
+
+export async function GET(request: NextRequest) {
+  const queries = await getQueries(request, 'userToEvent'); // Fetch query parameters for userToEvent
+  return GetUserToEvent(queries); // Call the GetUserToEvent function with the queries
+}
diff --git a/app/(api)/api/user-to-event/post.ts b/app/(api)/api/user-to-event/post.ts
new file mode 100644
index 00000000..2f93f027
--- /dev/null
+++ b/app/(api)/api/user-to-event/post.ts
@@ -0,0 +1,7 @@
+import { NextRequest } from 'next/server';
+import { createUserToEvent } from '@datalib/userToEvent/createUserToEvent';
+
+export async function POST(request: NextRequest) {
+  const body = await request.json();
+  return createUserToEvent(body);
+}
diff --git a/app/(api)/api/user-to-event/route.ts b/app/(api)/api/user-to-event/route.ts
new file mode 100644
index 00000000..1dd9dc1b
--- /dev/null
+++ b/app/(api)/api/user-to-event/route.ts
@@ -0,0 +1,10 @@
+// import authenticated from '@utils/authentication/authenticated';
+import { POST } from './post';
+import { GET } from './get';
+// import { PUT } from './[id]/put';
+import { DELETE } from './[id]/delete';
+
+// const POST = authenticated(post);
+// const GET = authenticated(get);
+
+export { POST, GET, /*PUT, */ DELETE };