Scroll issue - android

RegisterNewuser.java

package com.sandbox.signin;


import java.util.HashMap;

import com.sandbox.setup.AppAssets;
import com.sandbox.setup.BasicSetup;

import org.openqa.selenium.By;
import org.testng.annotations.Test;

import static org.testng.Assert.assertTrue;

import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.remote.RemoteWebElement;
import org.openqa.selenium.support.ui.*;

import io.appium.java_client.AppiumDriver;
import io.appium.java_client.android.AndroidDriver;


public class RegisterNewUser extends BasicSetup {
	
	
	@Test(priority=1)
	public void RegisterANewuser(){
		AppAssets assets = new AppAssets(driver);
		
		//Select language
		assets.SelectLanguage();
		
		//Select existing User Option
		assets.NewUser();
		
		//Accept Terms and conditions
		assets.TermsandConditions();
		
		//Sometimes ask for permission to allow ipay to connect contacts
		if (driver.findElement(By.id("com.ipay.mobile:id/etUsername")).isDisplayed()){			
			//Enter Login credentials 
		    assets.EnterNewUerDetails("pageup", "123456", "FirstName", "LastName", "sandaru023@gmail.com", "12555421", "912544258V", "15472869");
		}else{
			driver.findElement(By.id("com.android.packageinstaller:id/permission_allow_button")).click();
			//Enter Login credentials
			assets.EnterNewUerDetails("pageup", "123456", "FirstName", "LastName", "sandaru023@gmail.com", "12555421", "912544258V", "15472869");
		}

		JavascriptExecutor js1 = (JavascriptExecutor) driver;
        HashMap<String, String> scrollObject1 = new HashMap<String, String>();
        scrollObject1.put("direction", "up");
        js1.executeScript("mobile: scroll", scrollObject1);
		
        assets.RegisterBtn();
	}
}