Unable to sign in using apple id

Or are you looking for your Mac user account, that is your login user name to Mac.

If so, see the following Apple articles:

If you forgot your Mac login password

https://support.apple.com/en-us/HT202860

Change the login password on Mac

https://support.apple.com/en-gb/guide/mac-help/mchlp1550/mac

Reset your Mac login password

https://support.apple.com/en-mn/guide/mac-help/mh35902/mac

If you can't reset your Mac login password

https://support.apple.com/en-gb/HT212190

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See also ⤵️

If you forget your Apple ID or password

If you forget your Apple ID or password – Apple Support (UK)

Sign in with your Apple ID -> Sign in with your Apple ID - Apple Support                               

Sign in to your Apple ID preferences on Mac

Sign in or out of your Apple ID on Mac – Apple Support (UK)