Zend certified PHP/Magento developer

realvnc username was not recognized or password incorrect

When I login using vncviewer to vnc server it doesn’t give me a user name in the login prompt, just a password. If I enter the password it won’t log me in. I thought it might have a default username of admin and so only wanted a password, but no luck, see below. Am I doing something wrong? Did I misconfigure my vnc server in such a way that I can’t login?

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failed login