Attendees funcionality.

src/app/app.module.ts

@@ -11,6 +11,7 @@ import { AppComponent } from './app.component';
 import { HttpClientModule } from '@angular/common/http';
 
 import { InAppBrowser } from '@ionic-native/in-app-browser/ngx';
+import { IonicSelectableModule } from 'ionic-selectable';
 
 @NgModule({
   declarations: [AppComponent],
@@ -21,7 +22,8 @@ import { InAppBrowser } from '@ionic-native/in-app-browser/ngx';
     SplashScreen,
     HttpClientModule,
     { provide: RouteReuseStrategy, useClass: IonicRouteStrategy },
-    InAppBrowser
+    InAppBrowser,
+    IonicSelectableModule
   ],
   bootstrap: [AppComponent],
   schemas: [CUSTOM_ELEMENTS_SCHEMA]