Problem with sagenb and Google account

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Hello! I have been logging in to sagenb here for the past month or so using my Google account. Every time I clicked the Google button it would prompt me to create a profile, even though I had already made one and I had worksheets saved. Today, however, when I click the Google button and try to "create" the account, it tells me "Username already in use". Clearly the username exists, but I never gave it a password - I simply logged in using the Google account. Further, there's no way I see that I can recover or create a password. How do I remedy this, either by logging in with my old Google account or finding a way to obtain a new password? My username is Cook_Me_Plox. Thank you.