APEX 5 set custom failed login message - oracle-apex

Question

I'm using a custom login function resulting with a true/false value whenever the user should be allowed to login or not (a standard thing).
My problem is: when the function returns "false" the standard message is displayed "invalid login credentials"
even if the credentials are correct. Is there any chance to customize this message?
EXAMPLE: login function checks the credentials (ok) AND some additional, non relevant things (fe if the user is allowed to login into this particular application) (not ok) -> login = false -> invalid credentials message.
A small workaround that I know of is to raise a user defined exception in the login function but I'd like to omit that scenario as basically the run should be without errors (everything worked and was verified).

Answer 1

You need to create a validation on your login page. Like this:
In Page Processing click on Create validation:
Select Page as the validation level
Name the validation and select 'Inline in Notification' as the Error display location
Select PL/SQL as the validation type
In this case I will create a validation to avoid the login until January 1st 2025, so I chose PL/SQL expression as the sub type of PL/SQL validation
Enter the PL/SQL expression (it has to be a true/false evaluation) and the error message that will be displayed in case the condition return false.
Select the login button and allways as the condition type
And that's it. This validation will occur every time the login button will be pressed and return the custom message. Here's a working example try to login with any username or leave it blank and first will check the date condition.