Avoid Username Duplicate

I’m creating an app that requires users to sign up with a username and email. How can i avoid duplicate usernames. I created a modal where it is visible when "users all count is greater or equal to 1. With a filter of usernames equal input “usernames”

Hi @rfaienza,

These 2 relatively old videos might be useful for you:

They don’t answer your question directly but might give a hint about the approach you should use. Also, please keep in mind that it is better not to use conditional actions upon user signup, as they might not work as expected.