i have not created recovery key for my macbook pro and at the moment i have to recover my mac because a black screen is coming after i enter my password when i turn it on what to do or how i can create recovery key since my Machin is not booting??

Also try booting into Safe Mode. If Safe Mode works, then most likely you have some third party software installed which is causing a problem.

It would really help to post the exact model of your Mac and version of macOS being used. You can get the exact model of a non-booting Mac by entering the system serial number here:

Check Your Service and Support Coverage - Apple Support

Here's Apple guidance on blank screen: If your Mac starts up to a blank screen - Apple Support

Note the last instruction about contacting Apple Support .

I cannot use the Face ID on app