magento-test/app/code/Magento/NewsletterGraphQl/etc/schema.graphqls

# Copyright © Magento, Inc. All rights reserved.
# See COPYING.txt for license details.

type Mutation {
    subscribeEmailToNewsletter(email: String! @doc(description: "The email address that will receive the store's newsletter.")): SubscribeEmailToNewsletterOutput @doc(description:"Subscribe the specified email to the store's newsletter.") @resolver(class: "Magento\\NewsletterGraphQl\\Model\\Resolver\\SubscribeEmailToNewsletter")
}

type SubscribeEmailToNewsletterOutput @doc(description: "Contains the result of the `subscribeEmailToNewsletter` operation.") {
    status: SubscriptionStatusesEnum @doc(description: "The status of the subscription request.")
}

enum SubscriptionStatusesEnum @doc(description: "Indicates the status of the request.") {
    NOT_ACTIVE
    SUBSCRIBED
    UNSUBSCRIBED
    UNCONFIRMED
}