Is there a way to use a different email field for password reset emails?

I’m new to Meteor and have been tasked with implementing a password reset via email feature for an app that another developer has made. I’ve been experimenting with the accounts-ui and accounts-password packages and (so far) the password reset functionality (Accounts.forgotPassword) works fine as long as I populate the expected email field (meteor.users.emails.address). However, this app stores the email addresses in a “custom” field (

Is there any way to make forgotPassword use the email address from the custom field, instead? Due to some custom code and additional systems tied to this one, it may not be feasible to change the original code to use the “standard” email address field.