I have a Sign up page where the user can only sign up if it know's the company details, that's why i wanna check if KVK number and Company password exists in my database and if not it has to send back an error message. Down bellow you see that i have 2 input fields, i have made a local variable that's linked with these input fields. 

 Now i have tried 2 methode's to solve this. One was through the aggregate, here i try to check if the data from the input field's exists in my table like this (just fake data):

After the step above i have an action that check's if the form is valid and then check's if the aggregate is empty or not:

But it seem's like i always get an empty list back, how could i solve this problem