diff --git a/src/services/idnot/index.ts b/src/services/idnot/index.ts
index 8b82265..e3d2a88 100644
--- a/src/services/idnot/index.ts
+++ b/src/services/idnot/index.ts
@@ -5,20 +5,28 @@ dotenv.config();
 
 export class IdNotService {
   static async exchangeCodeForTokens(code: string) {
+
+    const tokenUrl = process.env.IDNOT_TOKEN_URL;
+    const clientId = process.env.IDNOT_CLIENT_ID;
+    const clientSecret = process.env.IDNOT_CLIENT_SECRET;
+    const redirectUri = process.env.IDNOT_REDIRECT_URI;
+
+    if (!tokenUrl || !clientId || !clientSecret || !redirectUri) {
+      throw new Error("Missing required IDNOT environment variables");
+    }
+
     const params = {
-      client_id: process.env.IDNOT_CLIENT_ID,
-      client_secret: process.env.IDNOT_CLIENT_SECRET,
-      redirect_uri: process.env.IDNOT_REDIRECT_URI,
-      grant_type: 'authorization_code',
+      client_id: clientId,
+      client_secret: clientSecret,
+      redirect_uri: redirectUri,
+      grant_type: "authorization_code",
       code: code
     };
 
     const tokens = await (
-      await fetch(process.env.IDNOT_TOKEN_URL, {
-        method: 'POST',
-        headers: {
-          'Content-Type': 'application/x-www-form-urlencoded',
-        },
+      await fetch(tokenUrl, {
+        method: "POST",
+        headers: { "Content-Type": "application/x-www-form-urlencoded" },
         body: new URLSearchParams(params).toString()
       })
     ).json();