Android - Como utilizar TextInputLayout con androidX

<?xml version="1.0" encoding="utf-8"?>

<androidx.coordinatorlayout.widget.CoordinatorLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".activities.LoginActivity">

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:orientation="vertical"

        android:weightSum="1">

        <RelativeLayout

            android:layout_width="match_parent"

            android:layout_height="match_parent"

            android:layout_weight="0.7"

            android:background="@drawable/gradient_green_to_white"

        >

            <ImageView

                android:layout_width="match_parent"

                android:layout_height="match_parent"

                android:paddingBottom="10dp"

                android:src="@drawable/ic_titulo_monagro2"

                />

        </RelativeLayout>

        <LinearLayout

            android:layout_width="match_parent"

            android:layout_height="match_parent"

            android:layout_weight="0.3"

            android:orientation="vertical">

        <com.google.android.material.textfield.TextInputLayout

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

           >

            <com.google.android.material.textfield.TextInputEditText

                android:id="@+id/username"

                android:layout_height="wrap_content"

                android:layout_width="match_parent"

                android:hint="@string/hint_username"

                android:theme="@style/EdithTextWhite"

                />

            <com.google.android.material.textfield.TextInputEditText

                android:id="@+id/password"

                android:layout_height="wrap_content"

                android:layout_width="match_parent"

                android:hint="@string/hint_password"

                android:inputType="textPassword"

                android:theme="@style/EdithTextWhite"

                />

        </com.google.android.material.textfield.TextInputLayout>

            <Button

                android:id="@+id/loginButton"

                android:layout_height="wrap_content"

                android:layout_width="match_parent"

                android:text="@string/text_button_loginButton"

                android:textColor="@color/white"

                android:theme="@style/RaisedButtonDark"

                android:layout_marginHorizontal="40dp" />

        </LinearLayout>

        ></LinearLayout>

</androidx.coordinatorlayout.widget.CoordinatorLayout>