Flow for all the files

frontend/stores/UserStore.js

@@ -1,25 +1,28 @@
+// @flow
 import { observable, action, computed } from 'mobx';
+import invariant from 'invariant';
 import { browserHistory } from 'react-router';
 import { client } from 'utils/ApiClient';
+import type { User, Team } from 'types';
 
 const USER_STORE = 'USER_STORE';
 
 class UserStore {
-  @observable user;
-  @observable team;
+  @observable user: ?User;
+  @observable team: ?Team;
 
-  @observable token;
-  @observable oauthState;
+  @observable token: ?string;
+  @observable oauthState: string;
 
-  @observable isLoading;
+  @observable isLoading: boolean = false;
 
   /* Computed */
 
-  @computed get authenticated() {
+  @computed get authenticated(): boolean {
     return !!this.token;
   }
 
-  @computed get asJson() {
+  @computed get asJson(): string {
     return JSON.stringify({
       user: this.user,
       team: this.team,
@@ -42,7 +45,11 @@ class UserStore {
     return this.oauthState;
   };
 
-  @action authWithSlack = async (code, state, redirectTo) => {
+  @action authWithSlack = async (
+    code: string,
+    state: string,
+    redirectTo: ?string
+  ) => {
     if (state !== this.oauthState) {
       browserHistory.push('/auth-error');
       return;
@@ -56,6 +63,10 @@ class UserStore {
       return;
     }
 
+    invariant(
+      res && res.data && res.data.user && res.data.team && res.data.accessToken,
+      'All values should be available'
+    );
     this.user = res.data.user;
     this.team = res.data.team;
     this.token = res.data.accessToken;