[#1] getting the calendars from the api

src/features/User/userAPI.ts

@@ -0,0 +1,12 @@
+export default async function getOpenPaasUserId(opaque_token: string) {
+  const response = await fetch(
+    `${process.env.REACT_APP_CALENDAR_BASE_URL}/api/user`,
+    {
+      headers: {
+        Authorization: `Bearer ${opaque_token}`,
+      },
+    }
+  );
+  const user = await response.json();
+  return user;
+}