Remove username from registration

/**
 * Removes the username field from the 
 * WP-Members registration form using
 * the `wpmem_fields` filter.
 */
add_filter( 'wpmem_fields', function( $fields, $tag ) {
    if ( 'register' == $tag ) {
        unset( $fields['username'] );
    }
    return $fields;
}, 10, 2 );

/**
 * Inserts a filler value for the username
 * field using the user's email address so
 * that the user can be inserted.
 * 
 * Uses the `wpmem_pre_validate_form` filter
 * and `wpmem_create_username_from_email()
 */
add_filter( 'wpmem_pre_validate_form', function( $post_data, $tag ) {
    if ( 'register' == $tag ) {
        $post_data['username'] = wpmem_create_username_from_email( $post_data['user_email'] );
    }
    return $post_data;
}, 10, 2 );

/**
 * This filters the text for the main body
 * login form and the widget to only display
 * "Email" instead of "Username or email".
 */
add_filter( 'wpmem_default_text', function( $text ) {
    $text['login_username'] = 'Email';
    $text['widget_login_username'] = 'Email';
    return $text;
});