diff --git a/src/components/App.js b/src/components/App.js
index 23f3683..7f6ca2f 100644
--- a/src/components/App.js
+++ b/src/components/App.js
@@ -1,4 +1,4 @@
-import React, { Suspense } from "react";
+import React, { useEffect } from "react";
 import { HashRouter, Route, Switch, Redirect } from "react-router-dom";
 
 // components
@@ -10,31 +10,31 @@ import Login from "../pages/login";
 
 // context
 import { useUserState } from "../context/UserContext";
+import { useTranslation } from "react-i18next";
 
 export default function App() {
-  // global
-  var { isAuthenticated } = useUserState();
+  var { authenticated, messageCode } = useUserState();
+  const { t } = useTranslation();
+
+  useEffect(() => {
+    if (!messageCode) return;
+    alert(t(messageCode));
+  }, [messageCode, t]);
 
   return (
-    <Suspense fallback={<div>Loading...</div>}>
-      <HashRouter basename={process.env.PUBLIC_URL || ""}>
-        <Switch>
-          <Route
-            exact
-            path="/"
-            render={() => <Redirect to="/app/dashboard" />}
-          />
-          <Route
-            exact
-            path="/app"
-            render={() => <Redirect to="/app/dashboard" />}
-          />
-          <PrivateRoute path="/app" component={Layout} />
-          <PublicRoute path="/login" component={Login} />
-          <Route component={Error} />
-        </Switch>
-      </HashRouter>
-    </Suspense>
+    <HashRouter basename={process.env.PUBLIC_URL || ""}>
+      <Switch>
+        <Route exact path="/" render={() => <Redirect to="/app/dashboard" />} />
+        <Route
+          exact
+          path="/app"
+          render={() => <Redirect to="/app/dashboard" />}
+        />
+        <PrivateRoute path="/app" component={Layout} />
+        <PublicRoute path="/login" component={Login} />
+        <Route component={Error} />
+      </Switch>
+    </HashRouter>
   );
 
   function PrivateRoute({ component, ...rest }) {
@@ -42,7 +42,7 @@ export default function App() {
       <Route
         {...rest}
         render={(props) =>
-          isAuthenticated ? (
+          authenticated ? (
             React.createElement(component, props)
           ) : (
             <Redirect
@@ -64,7 +64,7 @@ export default function App() {
       <Route
         {...rest}
         render={(props) =>
-          isAuthenticated ? (
+          authenticated ? (
             <Redirect
               to={{
                 pathname: "/"
diff --git a/src/context/UserContext.js b/src/context/UserContext.js
index 802861f..47d97bf 100644
--- a/src/context/UserContext.js
+++ b/src/context/UserContext.js
@@ -1,4 +1,5 @@
 import React from "react";
+import { authenticate, invalidate, validateToken } from "../utils/identity";
 
 var UserStateContext = React.createContext();
 var UserDispatchContext = React.createContext();
@@ -6,9 +7,15 @@ var UserDispatchContext = React.createContext();
 function userReducer(state, action) {
   switch (action.type) {
     case "LOGIN_SUCCESS":
-      return { ...state, isAuthenticated: true };
+      return { ...state, authenticated: true };
     case "SIGN_OUT_SUCCESS":
-      return { ...state, isAuthenticated: false };
+      return { ...state, authenticated: false };
+    case "LOGIN_FAILURE":
+      return {
+        ...state,
+        authenticated: false,
+        messageCode: action.payload?.messageCode
+      };
     default: {
       throw new Error(`Unhandled action type: ${action.type}`);
     }
@@ -17,7 +24,7 @@ function userReducer(state, action) {
 
 function UserProvider({ children }) {
   var [state, dispatch] = React.useReducer(userReducer, {
-    isAuthenticated: !!localStorage.getItem("id_token"),
+    authenticated: validateToken() === true
   });
 
   return (
@@ -45,32 +52,42 @@ function useUserDispatch() {
   return context;
 }
 
-export { UserProvider, useUserState, useUserDispatch, loginUser, signOut };
-
-// ###########################################################
+function setLoginFailed(dispatch, setError, setIsLoading, messageCode) {
+  dispatch({ type: "LOGIN_FAILURE", payload: { messageCode } });
+  setError(true);
+  setIsLoading(false);
+}
 
 function loginUser(dispatch, login, password, history, setIsLoading, setError) {
   setError(false);
   setIsLoading(true);
 
   if (!!login && !!password) {
-    setTimeout(() => {
-      localStorage.setItem('id_token', 1)
-      setError(null)
-      setIsLoading(false)
-      dispatch({ type: 'LOGIN_SUCCESS' })
+    authenticate(login, password).then((response) => {
+      if (response.status === "SUCCESS") {
+        setError(null);
+        setIsLoading(false);
+        dispatch({ type: "LOGIN_SUCCESS", payload: { token: response.token } });
+      } else if (response.status === "BAD_CREDENTIALS") {
+        setLoginFailed(
+          dispatch,
+          setError,
+          setIsLoading,
+          "Login.IncorrectCredentials"
+        );
+      }
+    });
 
-      history.push('/app/dashboard')
-    }, 2000);
+    history.push("/app/dashboard");
   } else {
-    dispatch({ type: "LOGIN_FAILURE" });
-    setError(true);
-    setIsLoading(false);
+    setLoginFailed(dispatch, setError, setIsLoading, "Login.EmptyCredentials");
   }
 }
 
 function signOut(dispatch, history) {
-  localStorage.removeItem("id_token");
+  invalidate();
   dispatch({ type: "SIGN_OUT_SUCCESS" });
   history.push("/login");
 }
+
+export { UserProvider, useUserState, useUserDispatch, loginUser, signOut };
diff --git a/src/hooks/index.js b/src/hooks/index.js
new file mode 100644
index 0000000..356f966
--- /dev/null
+++ b/src/hooks/index.js
@@ -0,0 +1 @@
+//export { useAuthorizationToken } from "./useAuthorizationToken";
diff --git a/src/index.js b/src/index.js
index 20c057e..139a7fe 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,4 +1,4 @@
-import React from "react";
+import React, { Suspense } from "react";
 import ReactDOM from "react-dom";
 import { ThemeProvider } from "@material-ui/styles";
 import { CssBaseline } from "@material-ui/core";
@@ -14,7 +14,9 @@ ReactDOM.render(
     <UserProvider>
       <ThemeProvider theme={Themes.default}>
         <CssBaseline />
-        <App />
+        <Suspense fallback={<div>Loading...</div>}>
+          <App />
+        </Suspense>
       </ThemeProvider>
     </UserProvider>
   </LayoutProvider>,
diff --git a/src/utils/identity.js b/src/utils/identity.js
index ba79528..14912c5 100644
--- a/src/utils/identity.js
+++ b/src/utils/identity.js
@@ -32,4 +32,18 @@ const invalidate = () => {
   }
 };
 
-export { storageKeys, authenticate, invalidate };
+const validateToken = () => {
+  const token = getItem(storageKeys.TOKEN);
+  if (!token) {
+    return false;
+  }
+
+  const valid = new Date(token.validUntil) >= new Date();
+  if (!valid) {
+    invalidate();
+  }
+
+  return valid;
+};
+
+export { storageKeys, authenticate, invalidate, validateToken };