diff --git a/services/Instagram/src/core/auth.js b/services/Instagram/src/core/auth.js
new file mode 100644
index 00000000..1fc23d9b
--- /dev/null
+++ b/services/Instagram/src/core/auth.js
@@ -0,0 +1,36 @@
+import {collection} from './db';
+
+/**
+ * {
+ *      username: String,
+ *      bio: String,
+ *      website: String,
+ *      profile_picture: String,
+ *      full_name: String,
+ *      id: String
+ * }
+ *
+ * @param accessToken
+ * @param user
+ */
+export async function authorizeUser(accessToken, user) {
+    const provider = 'instagram';
+    const users = collection('users');
+
+    let profile = await users.findOne({
+        provider: provider,
+        username: user.username
+    });
+
+    if(profile){
+        Object.keys(user).forEach(i => {
+            profile[i] = user[i];
+        });
+        profile.accessToken = accessToken;
+
+        await users.update({_id: profile['_id']}, profile);
+        return profile;
+    }else{
+        return null;
+    }
+}