hello I am working on my bot and I am looking for an action allowing my bot to respond only to people whose email I have saved or even only they can use artificial intelligence, help me, what action to use

Hi ! if I've understood correctly, you can have a table (like knowledge base), and at the start of the conversation ask the user for his email, and check that it's in the table. If it is, you direct the user to a workflow, otherwise to another one

there's a video on our youtube channel to verify user input