How do I add the passphrase for my private key into a script

Hi,

I have key pair authentication and I have scripted the file transfer process. But during the authentication process WinSCP is going to ask me for the passphrase for my private key.

Is there any way of scripting this so that I dont have to keep entering the passphrase since the transfer happens in the early morning. How can I do this so that it can be secure?

Thanks

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