A vendor profile can only contain one (1) user email which you use to log in with.
If you have multiple people at your company who are interested in viewing and submitting to Bonfire Opportunities, please see our guide Inviting a new user to a Vendor Organization.
In some circumstances, if you want to maintain the history of the account but the current owner has left the company, you can update the user email address to your own.
You can update the email by clicking Settings at the top right of the screen when logged in and changing the Email under the Email and Password section.
For more on this, take a look at our How do I change my email address? page.