I forgot my apple id and password.How can I recover them?

iCloud uses Apple ID credentials.

If you do not remember the Apple ID Password then follow the steps given in this Apple Article -> If you forgot your Apple ID password - Apple Support

If you do not remember the Apple ID then follow the steps given in this Apple Article -> If you forgot your Apple ID - Apple Support

Probably you are referring to Activation Lock.

If you are the owner or the owner has shared all information with you then to open Activation Lock:- If it is Activation locked, read here --> Turn off Activation Lock - Apple Support Activation Lock for iPhone, iPad, and iPod touch - Apple Support

Learn how to remove a device from a previous owner's account.

If you are not the owner and do not have the Apple ID and Password then there is no way that you can get into this iPhone unless the original owner shares the Apple ID and password with you. If you are lucky you can get into this iPhone if they (owner) accidentally remove the device from their Apple ID.

Well, let's see. You needed your Apple ID and Password to sign onto this support forum, so that might be a start.

Your Apple ID is often your email address. If you have forgotten your password......see this Apple Support document:

If you forgot your Apple ID password - Apple Support

This is a public forum.

Never post a screenshot with any personal credentials, such as email id, apple id, Mac Address, IMEI number, Serial Number, Phone number, Order ID, if you are sharing a map ensure your location is not identifiable. Etc.