Add better navigation

src/ConferenceCallManager.js

@@ -94,6 +94,10 @@ export class ConferenceCallManager extends EventEmitter {
     }
   }
 
+  static logout() {
+    localStorage.removeItem("matrix-auth-store");
+  }
+
   static async register(homeserverUrl, username, password) {
     try {
       const registrationClient = matrixcs.createClient(homeserverUrl);