The location of users.json on my computer is
C:\Users\morys\AppData\Roaming\psychopy3\pavlovia
If I open it in a text editor I can see something like:
{
"Wake": {
various details including
"email": "wake@opensciencetools.org",
"organization": "Oxford Brookes University",
"username": "Wake",
"web_url": "https://gitlab.pavlovia.org/Wake",
}
}
You probably have two and you should be able to edit the username for one of them. It should tell you the email address for your corporate account, for example.
Close PsychoPy before editing and reopen. You might need to get help from the OST team if you can’t access your group, but I wouldn’t have thought changing the name would change the password. Maybe you need access to the email account.