Verify SSH key fails

Hello Giteaers,

I started with git and gitea and working my way through different areas.
I am running Gitea as docker container followed that instructions (Installation with Docker | Gitea Documentation)

One is using ssh key instead of http. The ssh key has a passphrase

on Gitea - Settings - SSH / GPG Keys I added the new SSH Key and click on verify.
I am coping the instructed link and add the correct path to the private key.

When executing that verification string I am getting the following message
”Load key “/home/user/.ssh/private-key”: incorrect passphrase supplied to decrypt private key”

Where do I add the passphrase when executing the verification string?

Thanks