Refactor

src/reducers/user.js

@@ -0,0 +1,15 @@
+import { UPDATE_USER } from 'actions/UserActions';
+
+const user = (state = null, action) => {
+  switch (action.type) {
+    case UPDATE_USER: {
+      return {
+        ...action.user,
+      };
+    }
+    default:
+      return state;
+  }
+};
+
+export default user;