Update app.js

app.js

@@ -7,6 +7,14 @@ const agent = new ProxyAgent();
 const app = express();
 const port = process.env.PORT || 8081;
 
+function getAuthKey(req) {
+  const authHeader = req.headers['authorization'];
+  if (authHeader && authHeader.startsWith('Bearer ')) {
+    return authHeader.slice(7);
+  }
+  return null;
+};
+
 var opts = {
 	agent: agent,
 	auth: {
@@ -27,19 +35,12 @@ var opts = {
 	},
 };
 
-function getAuthKey(req) {
-  const authHeader = req.headers['authorization'];
-  if (authHeader && authHeader.startsWith('Bearer ')) {
-    return authHeader.slice(7);
-  }
-  return null;
-}
-
 app.post("/api/v1/messages", (req, res) => {
     const authKey = getAuthKey(req);
     if (authKey !== process.env.AUTH_KEY) {
       return res.status(401).json({ error: 'Unauthorized' });
-    }
+    };
+
 	req.rawBody = "";
 	req.setEncoding("utf8");