✨ : add api service for users

src/main/client/app/shared/api/users-api.js

@@ -0,0 +1,8 @@
+import axios from 'axios';
+
+export const getUsers = async () => {
+  const resp = await axios.get('/api/users');
+  return resp.data;
+};
+
+export const updateUser = async (user) => axios.put(`/api/users/${user.id}`, user);