To change your email on your HER profile follow these instructions depending on your device:
iOS: Go to My Profile > Settings > Account information > Email
Then tap on your email and you can change as needed. Don't forget to tap on "Save" located in the top, right hand corner before exiting the account settings view.
Android: Go to the "..." in the top right hand corner > Settings > Account information > Email
Enter in your email and once you say "ok" it will be saved.