How to Create two button in Bottom of the screen - xaml

Question

I want to create two buttons in the bottom of the screen using Xamarin.Forms and XAML like the image below:
I've tried to use a GridView but it's getting padding and space from two buttons.
This is how I've tried so far:
<Grid RowSpacing="0"
ColumnSpacing="0"
VerticalOptions="FillAndExpand"
HorizontalOptions="FillAndExpand">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="50*"/>
<ColumnDefinition Width="50*"/>
</Grid.ColumnDefinitions>
<Button Grid.Row="1" Grid.Column="0"
Text="SignUp"
FontSize="Large"/>
<Button Grid.Row="1" Grid.Column="1"
Text="LogIn"
FontSize="Large"/>
</Grid>

Answer 1

Try setting the Padding and Margin properties on the Gridview and Padding on the Buttons to 0. IE,
<GridView Padding="0" Margin="0" ... >
...
<Button Margin="0" ... />

Answer 2

I believe that buttons will not provide the desired design, once it has an inner padding, rounded corners and a mandatory uppercase on text (On Android, at least) that you can't change.
Maybe using expanded labels and gesture Recognizers give you a better fit.
Try this:
<Grid ColumnSpacing="0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="60"/>
</Grid.RowDefinitions>
<Label Grid.Column="0" Grid.Row="0"
Text="Signup"
TextColor="White"
FontSize="22"
BackgroundColor="Red"
HorizontalOptions="FillAndExpand"
VerticalOptions="FillAndExpand"
HorizontalTextAlignment="Center"
VerticalTextAlignment="Center">
<Label.GestureRecognizers>
<TapGestureRecognizer Command="{Binding SignupCommand}"/>
</Label.GestureRecognizers>
</Label>
<Label Grid.Column="1" Grid.Row="0"
Text="Login"
TextColor="White"
FontSize="22"
BackgroundColor="Green"
HorizontalOptions="FillAndExpand"
VerticalOptions="FillAndExpand"
HorizontalTextAlignment="Center"
VerticalTextAlignment="Center">
<Label.GestureRecognizers>
<TapGestureRecognizer Command="{Binding LoginCommand}"/>
</Label.GestureRecognizers>
</Label>
</Grid>