You cannot change your sign-in email address from the Account page.
At the moment, the app does not include an in-app option to update your email address.
What you can update in Account
The Profile tab lets you update:
Your first name
Your last name
Your profile photo
Your email address may appear in other areas of the account settings, but it is not editable.
Need to change your email?
Please contact support for help updating your email address.
Support: [email protected]