When data breaches occur, there are various kinds of data that get compromised. The most critical data that can get compromised is the user name or ID or the password. All is not lost due to a great service hosted by Troy Hunt. Use https://haveibeenpwned.com/ to check if the User name or user ID appears in the breached lists.
Alternatively, even https://monitor.firefox.com/ can be used to check if the user name or ID is part of any data breach.
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