You can change your email address (which is also your username in MarketScale) directly from your profile settings. No need to create a new account or contact an admin.
How to change your email
Go to your profile at https://studio.marketscale.com/user/profile - you can navigate there directly by clicking your profile icon in the top right of MarketScale, then click Settings under your name and title.
Scroll down to the Change email section.
Enter your current email address.
Enter your new email address.
Enter your current password to confirm.
Click Save.
You will need your current password to complete the change. If you have forgotten your password, use the Forgot Password link on the login page first — it sends a verification email so you can set a new password without needing your current one.
After saving, check your new inbox for a confirmation email. Your login updates once you confirm it.