linked registration button to mainMenu

frontEnd/src/pages/register/register.html

         </ion-item>
       
       </ion-list>
+      <button ion-button block (click)="register()">
+          <b>Register</b>
+        </button>
 </ion-content>

frontEnd/src/pages/register/register.ts

 import { Component } from '@angular/core';
 import { IonicPage, NavController, NavParams } from 'ionic-angular';
+import { MainMenuPage } from '../main-menu/main-menu';
 
 /**
  * Generated class for the RegisterPage page.
     console.log('ionViewDidLoad RegisterPage');
   }
 
+  register() {
+    this.navCtrl.setRoot(MainMenuPage);
+
+  }
+
 }