If you wish to have admin receive an email notification when another admin updates a user's credit you can add the following to the Model file.

 

File:
\administrator\components\com_rsappt_pro2\models\user_credit_detail.php

 

Around line 256 look for:

    } else {

      // admin edit
      $sql = 'INSERT INTO #__sv_apptpro2_user_credit_activity (user_id, comment, operator_id, balance) '.
        "VALUES (".JRequest::getVar('user_id').",".
        "'".JText::_('RS1_ADMIN_CREDIT_ACTIVITY_EDIT')." ".JRequest::getVar('balance')."',".
        $user->id.",".
        "(SELECT balance from #__sv_apptpro2_user_credit WHERE user_id = ".JRequest::getVar('user_id')."))";
        $this->_db->setQuery($sql);
        $this->_db->query();
        if ($this->_db->getErrorNum()) {
            $this->setError($this->_db->getErrorMsg());
            return false;
        }
    }

return true;
}

 

Add the red code..

    } else {

      // admin edit
      $sql = 'INSERT INTO #__sv_apptpro2_user_credit_activity (user_id, comment, operator_id, balance) '.
        "VALUES (".JRequest::getVar('user_id').",".
        "'".JText::_('RS1_ADMIN_CREDIT_ACTIVITY_EDIT')." ".JRequest::getVar('balance')."',".
        $user->id.",".
        "(SELECT balance from #__sv_apptpro2_user_credit WHERE user_id = ".JRequest::getVar('user_id')."))";
        $this->_db->setQuery($sql);
        $this->_db->query();
        if ($this->_db->getErrorNum()) {
            $this->setError($this->_db->getErrorMsg());
            return false;
        } 
    }

    $sql = 'SELECT * FROM #__sv_apptpro2_config';
    $this->_db->setQuery($sql);
    $apptpro_config = NULL;
    $apptpro_config = $this->_db->loadObject();
    if($apptpro_config->mailTO != "") {
        $mailer = JFactory::getMailer();
        $mailer->addRecipient($apptpro_config->mailFROM);   // <-- optionally you could hard code an email address here.
        $mailer->setSubject("User Credit Update");
        $mailer->setBody("User Credit Update on user: ".JRequest::getVar('user_id').", by operator:".$user->id);
        if($mailer->send() != true){
            logIt("Error sending email: ".$mailer->ErrorInfo);
        }
    }

 return true;

}

The above will send an email to the address in the Config screen, Basic Setup tab, Send email notifications TO box. You can hard code a specific email address if required above where indicated.

Change the subject and/or message text, shown in black, as desired.