How do I remove the action bar from the app?

I'm trying to remove the action bar from the app that I'm developing in NativeScript, I remove all the code that was related to the action bar (html and css code) but it continues appearing on the app.

HTML:

<ScrollView>
    <StackLayout class="page p-t-15">

            <Image src="~/app/img/logo.png" ></Image>
            <Label class="m-t-10 text-center" text="Login" label.Alignment = "top";></Label>

        <TextField class="m-t-10 m-b-10 m-l-15 m-r-15" hint="Email Address" keyboardType="email" autocorrect="false" autocapitalization="none"
            [(ngModel)]="email"></TextField>

        <TextField class="m-t-10 m-b-10 m-l-15 m-r-15" hint="Password" secure="true" autocorrect="false" autocapitalization="none"
            [(ngModel)]="password"></TextField>

        <Button class="btn btn-primary" text="SIGN IN" (tap)="onSigninButtonTap()"></Button>

        <Label class="m-t-10 text-center" text="______ or ______"></Label>

        <Button class="btn btn-outline" (tap)="onLoginWithSocialProviderButtonTap()" text="Log in with Social Provider"></Button>

        <Label class="m-t-10 m-b-10 m-l-15 m-r-15" text="Forgot password?" (tap)="onForgotPasswordTap()"></Label>

        <Label class="m-t-10 m-b-10 m-l-15 m-r-15" text="Não tem conta?" (tap)="onNaoTemContaTap()"></Label>
        <Button class="btn btn-primary" text="Sign UP" [nsRouterLink]="['/browse']" pageTransition="slide" clearHistory="true"></Button>
    </StackLayout>
</ScrollView>

CSS:

    StackLayout {
    height: 100%;
    width: 100%;
    background-image: linear-gradient(#000000,#439B9B , #000000); 
}

In the page(s) that you want to remove the action bar, add import { Page } from "tns-core-modules/ui/page";, then add private page: Page inside your constructor. This then allows you to do this.page.actionBarHidden = true;.

Somewhat like the following:

import { Page } from "tns-core-modules/ui/page";
...
export class ... {
    constructor(private page: Page) {
        this.page.actionBarHidden = true;
    }
    ...
}

Note: this code only works in nativescript with angular, the idea applies to vanilla nativescript but the code is different