AddRoleUser.php

<?php

namespace Drupal\user\Plugin\Action;


/**
 * Adds a role to a user.
 *
 * @Action(
 *   id = "user_add_role_action",
 *   label = @Translation("Add a role to the selected users"),
 *   type = "user"
 * )
 */
class AddRoleUser extends ChangeUserRoleBase {
    
    /**
     * {@inheritdoc}
     */
    public function execute($account = NULL) {
        $rid = $this->configuration['rid'];
        // Skip adding the role to the user if they already have it.
        if ($account !== FALSE && !$account->hasRole($rid)) {
            // For efficiency manually save the original account before applying
            // any changes.
            $account->original = clone $account;
            $account->addRole($rid);
            $account->save();
        }
    }

}