While Nifty can't help you change your name legally, you can certainly change your name or email from within Nifty to customize your experience.
Changing your Name and Email
In order to change your Name or Email, visit your Profile Settings via the gear in the drop down menu next to your name.
Changing your Name
To change your name, simply type your new desired name into the Full Name field and click the Save Changes button.
Changing your Email Address
To change the email address associated with your Nifty account, click on the Edit button in the email field to begin the reset flow.