User Authentication Flow Works

src/modules/fetchMicrosoftUser.ts

@@ -0,0 +1,33 @@
+import { MicrosoftGraphUser } from "../types/MSAuthTypes";
+
+/**
+ * Fetch Microsoft User
+ *
+ * This function fetches user data from Microsoft Graph API using the provided access token.
+ * It makes a GET request to the `/me` endpoint and returns the user data in JSON format.
+ *
+ * @param accessToken - This is the access token provided by Microsoft.
+ * @returns - Raw API Data from Microsoft.
+ */
+export const fetchMicrosoftUser = async (
+  accessToken: string,
+): Promise<MicrosoftGraphUser> => {
+  const graphEndpoint = "https://graph.microsoft.com/v1.0/me";
+
+  const response = await fetch(graphEndpoint, {
+    method: "GET",
+    headers: {
+      Authorization: `Bearer ${accessToken}`,
+    },
+  });
+
+  if (!response.ok) {
+    throw new Error(
+      `Graph request failed: ${response.status} ${response.statusText}`,
+    );
+  }
+
+  const data = (await response.json()) as MicrosoftGraphUser;
+
+  return data;
+};