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Remember that there is also interesting information in our FAQs that could help you quickly.
Yes, click on your username's avatar in the upper right hand corner, it will display a panel from which you can update your username.
To change the email associated with your user account you must make a request to the support team and follow the steps they indicate to pass a validation and verification process. After this, the change will be effective.
No. Each team is legitimately owned by the user who created it. Administrators have the necessary permissions to maintain all the teams in their competition.
The new participant must be registered in the corresponding competition. Later on in the tab "Participants" you can use the tool to replace a participant by another one.