BuddyPress.org

I would like to replace some text with photo in Buddypress welcome email. I’m new to WordPress and filter.

<?php
do_action( 'bp_before_email_header' );
echo bp_get_option( 'blogname' );
do_action( 'bp_after_email_header' );
?>

I add a code on function.php like this:

add_action( 'bp_before_email_header', 'add_logo');
function add_logo() {
    echo '<img src="photo url"';
}

There’s a photo in email header, however, I would like to remove the text bp_get_option( ‘blogname’ ); If there’s no apply filter, I can not modify it without editing it directly? How can I do that?

Thank you for your help!