You can change the details on the account the following way:
- Use your phone to log into the account with the username.
- Once logged in, go to your profile settings; it's the 3 horizontal stripes at the top left corner of the FitVault home screen.
- Tap profile, and then change the name to the one you intend to use.
- Then be sure to enter the correct ID number, and also select Multiply as your Health Provider.
- Thereafter you are good to go. However you will not be able to change the email address to another one.