I have forgotten my iPad user name and password

David13- Said:

"have forgotten user name and password"

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Username and Password for what?

An iPad doesn't have a username and password for itself. So, if you are referring to a site or app of sorts, then use the "Forgot your Password?" link.

If it is the Passcode, check this link...

https://support.apple.com/en-us/HT211078

If it is Activation Lock, check this link...

https://support.apple.com/en-us/HT201441