Where do i find my Authentication Code???

Technical Support
I have no idea where to find my authentication code for Diablo 3. I just bought the game and I can not find where my auth code is. Please assist!

~Term1nal
You mean a game code? If you bought it digitally, I don't believe you need one, if it's added to your BNet account already you should be good to go once the game is done installing.
perfect. thanks man
I have the authentication code and purchased D3 online. I am installing D3 on my laptop but im getting this error "Could not install. Invalid installation options. Please try again."

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