diff --git a/src/components/accounts/AccountSwitcher.js b/src/components/accounts/AccountSwitcher.js
index a29b0b1..36e369f 100644
--- a/src/components/accounts/AccountSwitcher.js
+++ b/src/components/accounts/AccountSwitcher.js
@@ -28,7 +28,7 @@ export class AccountSwitcher extends Component {
                 id: PropTypes.number
             }))
         }),
-        user: userShape, // TODO: remove me, when we will be sure, that accounts.active is always set for user
+        user: userShape, // TODO: remove me, when we will be sure, that accounts.active is always set for user (event after register)
         skin: PropTypes.oneOf(skins),
         highlightActiveAccount: PropTypes.bool, // whether active account should be expanded and shown on the top
         allowLogout: PropTypes.bool, // whether to show logout icon near each account
@@ -46,7 +46,8 @@ export class AccountSwitcher extends Component {
 
     render() {
         const { accounts, skin, allowAdd, allowLogout, highlightActiveAccount } = this.props;
-        const activeAccount = accounts.active || this.props.user;
+        // const activeAccount = accounts.active || this.props.user;
+        const activeAccount = this.props.user;
 
         let {available} = accounts;
 
@@ -163,8 +164,7 @@ import { authenticate, revoke } from 'components/accounts/actions';
 
 export default connect(({accounts, user}) => ({
     accounts,
-    user,
-    userLang: user.lang // this is to force re-render on lang change
+    user
 }), {
     switchAccount: authenticate,
     removeAccount: revoke
diff --git a/src/components/user/reducer.js b/src/components/user/reducer.js
index da29117..c8b92f3 100644
--- a/src/components/user/reducer.js
+++ b/src/components/user/reducer.js
@@ -1,23 +1,25 @@
+// @flow
 import { UPDATE, SET, CHANGE_LANG } from './actions';
 
 export type User = {
-    id: number,
-    uuid: string,
+    id: ?number,
+    uuid: ?string,
     token: string,
     username: string,
     email: string,
     avatar: string,
     isGuest: boolean,
     isActive: boolean,
-    passwordChangedAt: number,
+    passwordChangedAt: ?number,
     hasMojangUsernameCollision: bool,
 };
 
 
-const defaults = {
+const defaults: User = {
     id: null,
     uuid: null,
     username: '',
+    token: '',
     email: '',
     // will contain user's email or masked email
     // (e.g. ex**ple@em*il.c**) depending on what information user have already provided
@@ -35,8 +37,8 @@ const defaults = {
 };
 
 export default function user(
-    state = null,
-    {type, payload = null}
+    state: User = defaults,
+    {type, payload}: {type: string, payload: ?Object}
 ) {
     switch (type) {
         case CHANGE_LANG:
diff --git a/src/components/userbar/LoggedInPanel.js b/src/components/userbar/LoggedInPanel.js
index adad7d5..882148a 100644
--- a/src/components/userbar/LoggedInPanel.js
+++ b/src/components/userbar/LoggedInPanel.js
@@ -1,5 +1,5 @@
+// @flow
 import React, { Component } from 'react';
-import ReactDOM from 'react-dom';
 
 import classNames from 'classnames';
 
@@ -7,25 +7,33 @@ import { AccountSwitcher } from 'components/accounts';
 
 import styles from './loggedInPanel.scss';
 
-import { userShape } from 'components/user/User';
+import type { User } from 'components/user';
 
 export default class LoggedInPanel extends Component {
-    static displayName = 'LoggedInPanel';
-    static propTypes = {
-        user: userShape
+    props: {
+        user: User
     };
 
     state = {
         isAccountSwitcherActive: false
     };
 
+    _isMounted: boolean = false;
+    el: ?HTMLElement;
+
     componentDidMount() {
-        document.addEventListener('click', this.onBodyClick);
+        if (window.document) {
+            window.document.addEventListener('click', this.onBodyClick);
+        }
+
         this._isMounted = true;
     }
 
     componentWillUnmount() {
-        document.removeEventListener('click', this.onBodyClick);
+        if (window.document) {
+            window.document.removeEventListener('click', this.onBodyClick);
+        }
+
         this._isMounted = false;
     }
 
@@ -34,7 +42,7 @@ export default class LoggedInPanel extends Component {
         const { isAccountSwitcherActive } = this.state;
 
         return (
-            <div className={classNames(styles.loggedInPanel)}>
+            <div ref={(el) => this.el = el} className={classNames(styles.loggedInPanel)}>
                 <div className={classNames(styles.activeAccount, {
                     [styles.activeAccountExpanded]: isAccountSwitcherActive
                 })}>
@@ -45,7 +53,7 @@ export default class LoggedInPanel extends Component {
                     </button>
 
                     <div className={classNames(styles.accountSwitcherContainer)}>
-                        <AccountSwitcher skin="light" onAfterAction={this.toggleAccountSwitcher} />
+                        <AccountSwitcher skin="light" onAfterAction={this.onToggleAccountSwitcher} />
                     </div>
                 </div>
             </div>
@@ -56,14 +64,18 @@ export default class LoggedInPanel extends Component {
         isAccountSwitcherActive: !this.state.isAccountSwitcherActive
     });
 
-    onExpandAccountSwitcher = (event) => {
+    onToggleAccountSwitcher = () => {
+        this.toggleAccountSwitcher();
+    };
+
+    onExpandAccountSwitcher = (event: Event) => {
         event.preventDefault();
 
         this.toggleAccountSwitcher();
     };
 
     onBodyClick = createOnOutsideComponentClickHandler(
-        () => ReactDOM.findDOMNode(this),
+        () => this.el,
         () => this.state.isAccountSwitcherActive && this._isMounted,
         () => this.toggleAccountSwitcher()
     );
@@ -81,15 +93,19 @@ export default class LoggedInPanel extends Component {
  *
  * @return {function}
  */
-function createOnOutsideComponentClickHandler(getEl, isActive, callback) {
+function createOnOutsideComponentClickHandler(
+    getEl: () => ?HTMLElement,
+    isActive: () => boolean,
+    callback: Function
+) {
     // TODO: we have the same logic in LangMenu
     // Probably we should decouple this into some helper function
     // TODO: the name of function may be better...
-    return (event) => {
-        if (isActive()) {
-            const el = getEl();
+    return (event: MouseEvent & {target: HTMLElement}) => {
+        const el = getEl();
 
-            if (!el.contains(event.target) && el !== event.taget) {
+        if (isActive() && el) {
+            if (!el.contains(event.target) && el !== event.target) {
                 event.preventDefault();
 
                 // add a small delay for the case someone have alredy called toggle