I have one query regarding user input:
I am accepting the input from the user, need to fill it in username text box,
in my user name should be like Alex123 or 123Alex, I need to throw an error if user give 123455 as username and go back to the input dialogue to enter again.
It should accept only number and character and underscore.
How can I validate user input before going to further step?
Second case: FirstName should be only string, How can I apply regular expression for this in Uipath?