add a column to the user page and adds the data to the column

modify-user-columns.php

function ms_modify_user_columns($column_headers) {
  $column_headers['membership'] = 'Membership';
  return $column_headers;
}

add_action('manage_users_columns','ms_modify_user_columns');

function ms_get_user_membership($empty = '', $column_name, $id) {

    if( $column_name == 'membership' ) {
        $mem = array();
        $mem = get_user_meta($id, "_cmb_membership", true);
        $mem = implode(", ", (array)$mem);
        return $mem;
    }
}

add_action('manage_users_custom_column', 'ms_get_user_membership', 10, 3);