feat(strava): add current user utility function

packages/backend/src/apps/strava/common/get-current-user.ts

@@ -0,0 +1,10 @@
+import { IGlobalVariable, IJSONObject } from '@automatisch/types';
+
+const getCurrentUser = async ($: IGlobalVariable): Promise<IJSONObject> => {
+  const response = await $.http.get('/v3/athlete');
+  const currentUser = response.data;
+
+  return currentUser;
+};
+
+export default getCurrentUser;