Ionic 5: Form doesn't catch the input value

 I was upgrading my Ionic 3 app to Ionic 5. I was basically creating a new blank app and adding everything back in. Yesterday when I was re-creating the SignupPage, I ran into a weird issue. When I hit "create account" button, it didn't catch any input value in the form. Everything is blank. I checked and re-checked my code. Everything looks correct. It turned out to be that I forgot to add SignupPage to the decrlarations of in the module!!! 

@NgModule({

  imports: [

    CommonModule,

    FormsModule,

    ReactiveFormsModule,

    IonicModule,

    LoginPageRoutingModule

  ],

  declarations: [

    LoginPage,

    SignupPage

  ]

})