redirection and merge resolve (fix #113)

This commit will add
- redirections to behaviour page

- resolving a merge conflict

frontend/src/components/pages/Login.js

@@ -4,6 +4,7 @@ import "../../App.css";
 import Footer from "../../Footer";
 import InputField from "../InputField";
 import SubmitField from "../SubmitField";
+import { Redirect } from "react-router";
 import { login, useAuth, logout } from "../../auth/AuthProvider";
 import Secret from "./Secret";
 import ErrorMessage from "../ErrorMessage";
@@ -71,8 +72,7 @@ export default function Login() {
           </form>
         ) : (
           <>
-            <Secret />
-            <button onClick={() => logout()}>Logout</button>
+            <Redirect to="/behavior" />
           </>
         )}
       </div>