add delegate functionality

src/app/services/alert.service.ts

@@ -19,4 +19,18 @@ export class AlertService {
     await alert.present();
   }
 
+  async presentErrorMessage(message:string) {
+    const alert = await this.alertController.create({
+      cssClass: 'my-custom-class',
+      header: 'Mensagem de erro',
+      message: message,
+    });
+
+    await alert.present();
+    
+    setTimeout(()=>{
+      alert.dismiss();
+    }, 2500);
+  }
+
 }