chore(frontend): changed source code to src folder from root

frontend/src/pages/api/auth/CheckAuth.ts

@@ -0,0 +1,16 @@
+import SecurityClient from '~/utilities/SecurityClient';
+
+/**
+ * This function is used to check if the user is authenticated.
+ * To do that, we get their tokens from cookies, and verify if they are good.
+ */
+const checkAuth = async () => {
+  return SecurityClient.fetchCall('/api/v1/auth/checkAuth', {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json'
+    }
+  }).then((res) => res);
+};
+
+export default checkAuth;