# Unlock  Oracle APEX application user APEX_UTIL. unlock_account

Often you get the requirement to provide the APEX application user unlock feature from a user interface. Oracle APEX provides APEX\_UTIL. unlock\_account which can be used to unlock a user account.

You can create a form with the user listing and provide a button to unlock the user. On button click, you can write a dynamic action to execute pl/sql server-side code.

`begin`

`apex_util.unlock_account('user_to_unlock');`

`end;`

So what happens when you click the button? You will get an error page as below if you have not modified the Application security definition attribute "Modify Workspace Repository ".

> APEX - An API call has been prohibited. Contact your application administrator.

![](https://cdn.hashnode.com/res/hashnode/image/upload/v1671473060234/TSUpJtP2h.jpg align="center")

To avoid this error modify the Application definition.  Go to App Builder >> Click on the application icon >> Click Edit

![](https://cdn.hashnode.com/res/hashnode/image/upload/v1671473520603/YtdIWmIlP.jpg align="center")

Check the "Modify Workspace Repository " check box and Apply

![](https://cdn.hashnode.com/res/hashnode/image/upload/v1671473592527/MubMiJBGq.jpg align="center")

This will allow you to modify application security attributes in run time using API programming interface. ie package APEX\_UTIL.UNLOCK\_ACCOUNT.

Other provisions like Create User, Remove user, reset password etc can be developed.