<TextView
    android:text="Username: "
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/usernameTV"
    android:layout_alignParentTop="true"
    android:layout_alignParentStart="true"
    android:layout_marginStart="16dp"
    app:layout_constraintLeft_toLeftOf="parent"
    android:layout_marginTop="40dp"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintRight_toLeftOf="@+id/usernameET"
    android:layout_marginEnd="8dp"
    app:layout_constraintHorizontal_bias="0.0" />
<EditText
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:inputType="textPersonName"
    android:ems="10"
    android:id="@+id/usernameET"
    android:layout_alignBaseline="@+id/usernameTV"
    android:layout_alignBottom="@+id/usernameTV"
    android:layout_alignStart="@+id/passwordET"
    android:layout_marginTop="24dp"
    app:layout_constraintTop_toTopOf="parent"
    android:layout_marginEnd="16dp"
    app:layout_constraintRight_toRightOf="parent" />
<TextView
    android:text="Password: "
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/passwordTV"
    android:layout_below="@+id/usernameET"
    android:layout_alignEnd="@+id/usernameTV"
    android:layout_marginTop="48dp"
    app:layout_constraintTop_toBottomOf="@+id/usernameTV"
    android:layout_marginStart="16dp"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toLeftOf="@+id/passwordET"
    android:layout_marginEnd="8dp"
    app:layout_constraintHorizontal_bias="0.0" />
<EditText
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:inputType="textPassword"
    android:ems="10"
    android:id="@+id/passwordET"
    android:layout_alignBaseline="@+id/passwordTV"
    android:layout_alignBottom="@+id/passwordTV"
    android:layout_alignParentEnd="true"
    android:layout_marginTop="24dp"
    app:layout_constraintTop_toBottomOf="@+id/usernameET"
    android:layout_marginEnd="16dp"
    app:layout_constraintRight_toRightOf="parent" />