diff --git a/app/api/participants/route.js b/app/api/participants/route.js
index 3299da5..8c57ac5 100644
--- a/app/api/participants/route.js
+++ b/app/api/participants/route.js
@@ -1,25 +1,25 @@
 import { NextResponse } from "next/server";
-import { PrismaClient } from "@prisma/client";
-
-const prisma = new PrismaClient();
+import dbConnect from "../../../lib/dbConnect";
+import UserModel from "../../../models/UserModel";
 
 export async function POST(request) {
     try {
+        await dbConnect();
         const body = await request.json();
-        const { tournamentId, participantName } = body;
-        
-        const newParticipant = await prisma.participant.create({
-            data: {
-                name: participantName,
-                tournamentId,
-            }
-        });
+        const { tournamentId, participantName, userId } = body;
+
+        const user = await UserModel.findById(userId);
+        if (!user) {
+            return NextResponse.json({ message: "User not found" }, { status: 404 });
+        }
+
+        user.eventsRegistered.push(tournamentId);
+
+        await user.save();
 
-        return NextResponse.json({ message: "Participant added successfully", participant: newParticipant });
+        return NextResponse.json({ message: "Participant added successfully", user });
     } catch (error) {
         console.error("Error adding participant:", error);
         return NextResponse.json({ message: "An error occurred while adding the participant" }, { status: 500 });
-    } finally {
-        await prisma.$disconnect();
     }
 }
diff --git a/app/api/tournaments/[id]/registration/route.js b/app/api/tournaments/[id]/registration/route.js
index 77608a2..f8bd1b6 100644
--- a/app/api/tournaments/[id]/registration/route.js
+++ b/app/api/tournaments/[id]/registration/route.js
@@ -1,27 +1,30 @@
-import { PrismaClient } from "@prisma/client";
 import { NextResponse } from "next/server";
+import dbConnect from "../../../../../lib/dbConnect";
+import Tournament from "../../../../../models/Tournament";
 
-const prisma = new PrismaClient();
+export default async function POST(request, { params }) {
+    await dbConnect();
 
-export default async function POST(request, {params}){
-    
     const id = params.id;
+    const { registrationData } = await request.json();
 
-    const {registrationData } =request.body
-    
     try {
-        const updatedTournament = await prisma.tournament.update({
-            where: {id},
-            data:  {registrations: registrationData}
-        });
+        const updatedTournament = await Tournament.findByIdAndUpdate(
+            id,
+            { registrations: registrationData },
+            { new: true }
+        );
 
-        return NextResponse.status(200).json({message: "Registration updated successfully", tournament: updatedTournament});
+        if (!updatedTournament) {
+            return NextResponse.status(404).json({ message: "Tournament not found" });
+        }
 
+        return NextResponse.status(200).json({
+            message: "Registration updated successfully",
+            tournament: updatedTournament
+        });
     } catch (error) {
-        console.log(("error while updating tournament", error))
-        return NextResponse.status(500).json({message: "Error while updating the registration"})
-    }
-    finally{
-        await prisma.$disconnect();
+        console.error("Error while updating tournament", error);
+        return NextResponse.status(500).json({ message: "Error while updating the registration" });
     }
-}
\ No newline at end of file
+}
diff --git a/app/api/tournaments/[id]/structure/route.js b/app/api/tournaments/[id]/structure/route.js
index 995a79f..fc536fa 100644
--- a/app/api/tournaments/[id]/structure/route.js
+++ b/app/api/tournaments/[id]/structure/route.js
@@ -1,17 +1,23 @@
 import { NextResponse } from "next/server";
-import { PrismaClient } from "@prisma/client";
-
-const prisma = new PrismaClient();
+import dbConnect from "../../../../../lib/dbConnect";
+import Tournament from "../../../../../models/Tournament";
 
 export default async function POST(request, { params }) {
+    await dbConnect();
+
     const id = params.id; // Extract the tournament ID from params
     const { structureData } = await request.json(); // Correctly parse the request body
 
     try {
-        const updatedTournament = await prisma.tournament.update({
-            where: { id: id }, // Use the correct ID parameter
-            data: { structure: structureData },
-        });
+        const updatedTournament = await Tournament.findByIdAndUpdate(
+            id,
+            { structure: structureData },
+            { new: true }
+        );
+
+        if (!updatedTournament) {
+            return NextResponse.status(404).json({ message: "Tournament not found" });
+        }
 
         return NextResponse.json({
             message: "Tournament structure updated successfully",
@@ -22,7 +28,5 @@ export default async function POST(request, { params }) {
         return NextResponse.json({
             message: "An error occurred while updating the tournament structure",
         }, { status: 500 });
-    } finally {
-        await prisma.$disconnect();
     }
 }