Set a dfualt value for custom field

Hello,

Is it possible to add default value for an additional field?

I’ve referred to this https://givewp.com/documentation/developers/how-to-create-custom-form-fields/ article and made an additional text field. But I need to add a default value for that text field.

Ex: I need an additional form field called “Birth City” in the donation form and its default value should be “London”

add_action( ‘give_fields_after_donation_amount’, function( $collection ) {
$collection->append(
give_field( ‘text’, ‘Birth City” )
->showInReceipt()
->label( __(‘Birth City’) )
->value(‘London’)
->storeAsDonorMeta()
->required()
->helpText( __( ‘This is a field used to add your birth city.’ ) )
);
});

I just added this code, but it shows an error. ->value(‘London’) here is the place I got stuck. It’s urgent, Please advice

Thanks