feat(auth): Enhance verify OTP API route

- Implemented the �erifyOTP API route to handle user OTP verification
- Utilized the �llowedroles constant from the @Constants module to restrict access to the �erifyOTP endpoint based on user roles
- Leveraged the getModelByRole utility function from the @utils module to dynamically retrieve the appropriate user model based on the user's role

app/api/auth/verifyotp/route.ts

@@ -1,7 +1,7 @@
 import { setSession } from "@sessions/sessionUtils";
-import dbConfig from "@utils/db";
+import { dbConfig, getModelByRole } from "@utils/index";
+import { allowedRoles } from "@constants/index";
 import logUserActivity from "@lib/logs";
-import { Doctor, Hospital, Patient, Receptionist } from "@models/index";
 
 type bodyType = {
   email: string;
@@ -10,8 +10,6 @@ type bodyType = {
   action: string;
 };
 
-const allowedRoles = ["patient", "receptionist", "doctor", "hospital"];
-
 export async function POST(req: Request) {
   try {
     const body: bodyType = await req.json();
@@ -37,7 +35,12 @@ export async function POST(req: Request) {
 async function checkOTP(body: bodyType, req: Request) {
   await dbConfig();
 
-  const user = await getUserModel(body.email, body.role);
+  const UserModel = getModelByRole(body.role);
+
+  const user = await UserModel.findOne(
+    { email: body.email },
+    { _id: 0, username: 1, firstname: 1, lastname: 1, otp: 1 }
+  );
 
   if (!user || user.otp !== body.otp)
     return Response.json({ error: "OTP Verification Failed" });
@@ -60,25 +63,3 @@ async function checkOTP(body: bodyType, req: Request) {
 
   return Response.json({ message: "ok" }, { status: 200 });
 }
-// retrieves a user from the database based on email and role
-async function getUserModel(email: string, role: string) {
-  const projection = {
-    _id: 0,
-    username: 1,
-    firstname: 1,
-    lastname: 1,
-    otp: 1,
-  };
-  switch (role) {
-    case "patient":
-      return await Patient.findOne({ email }, projection);
-    case "receptionist":
-      return await Receptionist.findOne({ email }, projection);
-    case "doctor":
-      return await Doctor.findOne({ email }, projection);
-    case "hospital":
-      return await Hospital.findOne({ email }, projection);
-    default:
-      return null;
-  }
-}