email_registration-8.x-1.1/config/schema/email_registration.schema.yml

email_registration.settings:
  type: config_object
  label: 'Email registration config'
  mapping:
    login_with_username:
      type: boolean
      label: 'Allow users to log in with email address or username.'

# Commerce.
commerce_checkout.commerce_checkout_pane.email_registration_login:
  type: commerce_checkout_pane_configuration
  mapping:
    allow_guest_checkout:
      type: boolean
      label: 'Allow guest checkout'
    allow_registration:
      type: boolean
      label: 'Allow registration'
    registration_form_mode:
      type: string
      label: 'Registration form mode'

action.configuration.email_registration_update_username:
  type: action_configuration_default
  label: 'Update Username Action'