Read again the documentation for the auth method. If you are using password authentication exclusively, you can replace it with 
$ssh2->auth_password('un', 'pw');

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لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re: Weird error with SSH2 authentication by choroba
in thread Weird error with SSH2 authentication by ladyscifi

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