Because Vowel is built on top of Google Apps, we do not actually have an email or password for you to change! To change your Google Account password, you can do that from the Google Account Settings console.
If you'd like to add a different email to your team's Vowel, you can just invite that email address in the Team Settings page in Vowel.
If you'd like to start a new team with a different email, you can do that by signing up on vowel.com and creating a new team.
Did we miss something? Still have a question? Email us at firstname.lastname@example.org to let us know.