What is the meaning of "Permission denied (publickey)" error when trying to access git@github.com account?

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The "Permission denied (publickey)" error occurs when you are trying to access a remote git repository (in this case, GitHub) using SSH, and your public key is not authorized to access the repository. This means that either the public key is not registered with the account, or the account does not have permission to access the repository. To resolve the issue, you need to check if you have added the correct public key to your GitHub account, and that you have the necessary permissions to access the repository.