Can you give me a recovery key please ?

Nobody can give you the key even Apple, because it is used for full security and access available only to you. So when you were setting it up you should have written it down on a paper and then keep it. If you haven't written the code anywhere it is not possible to get it.

Using a recovery key is more secure, but it means that you’re responsible for maintaining access to your trusted devices and your recovery key. If you lose both of these items, you could be locked out of your account permanently. With that in mind, it's important to keep your recovery key in a safe place. You might want to give a copy of your recovery key to a family member, or keep copies in more than one place. That way you always have your recovery key when you need it.

From this article: How to generate a recovery key - Apple Support