Add Essentials Contacts resource

.changelog/4469.txt

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+```release-note:new-resource
+`google_essential_contacts_contact`
+```

website/docs/r/cloud_identity_group.html.markdown

@@ -25,6 +25,11 @@ description: |-
 A Cloud Identity resource representing a Group.
 
 
+To get more information about Group, see:
+
+* [API documentation](https://cloud.google.com/identity/docs/reference/rest/v1beta1/groups)
+* How-to Guides
+    * [Official Documentation](https://cloud.google.com/identity/docs/how-to/setup)
 
 ~> **Warning:** If you are using User ADCs (Application Default Credentials) with this resource,
 you must specify a `billing_project` and set `user_project_override` to true 

website/docs/r/cloud_identity_group_membership.html.markdown

@@ -25,6 +25,11 @@ description: |-
 A Membership defines a relationship between a Group and an entity belonging to that Group, referred to as a "member".
 
 
+To get more information about GroupMembership, see:
+
+* [API documentation](https://cloud.google.com/identity/docs/reference/rest/v1/groups.memberships)
+* How-to Guides
+    * [Official Documentation](https://cloud.google.com/identity/docs/how-to/memberships-google-groups)
 
 ~> **Warning:** If you are using User ADCs (Application Default Credentials) with this resource,
 you must specify a `billing_project` and set `user_project_override` to true 

website/docs/r/essential_contacts_contact.html.markdown

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+---
+# ----------------------------------------------------------------------------
+#
+#     ***     AUTO GENERATED CODE    ***    AUTO GENERATED CODE     ***
+#
+# ----------------------------------------------------------------------------
+#
+#     This file is automatically generated by Magic Modules and manual
+#     changes will be clobbered when the file is regenerated.
+#
+#     Please read more about how to change this file in
+#     .github/CONTRIBUTING.md.
+#
+# ----------------------------------------------------------------------------
+subcategory: "Essential Contacts"
+layout: "google"
+page_title: "Google: google_essential_contacts_contact"
+sidebar_current: "docs-google-essential-contacts-contact"
+description: |-
+  A contact that will receive notifications from Google Cloud.
+---
+
+# google\_essential\_contacts\_contact
+
+A contact that will receive notifications from Google Cloud.
+
+~> **Warning:** This resource is in beta, and should be used with the terraform-provider-google-beta provider.
+See [Provider Versions](https://terraform.io/docs/providers/google/guides/provider_versions.html) for more details on beta resources.
+
+To get more information about Contact, see:
+
+* [API documentation](https://cloud.google.com/resource-manager/docs/reference/essentialcontacts/rest/v1beta1/projects.contacts)
+* How-to Guides
+    * [Official Documentation](https://cloud.google.com/resource-manager/docs/managing-notification-contacts)
+
+~> **Warning:** If you are using User ADCs (Application Default Credentials) with this resource,
+you must specify a `billing_project` and set `user_project_override` to true 
+in the provider configuration. Otherwise the Essential Contacts API will return a 403 error. 
+Your account must have the `serviceusage.services.use` permission on the 
+`billing_project` you defined.
+
+<div class = "oics-button" style="float: right; margin: 0 0 -15px">
+  <a href="https://console.cloud.google.com/cloudshell/open?cloudshell_git_repo=https%3A%2F%2Fgithub.com%2Fterraform-google-modules%2Fdocs-examples.git&cloudshell_working_dir=essential_contact&cloudshell_image=gcr.io%2Fgraphite-cloud-shell-images%2Fterraform%3Alatest&open_in_editor=main.tf&cloudshell_print=.%2Fmotd&cloudshell_tutorial=.%2Ftutorial.md" target="_blank">
+    <img alt="Open in Cloud Shell" src="//gstatic.com/cloudssh/images/open-btn.svg" style="max-height: 44px; margin: 32px auto; max-width: 100%;">
+  </a>
+</div>
+## Example Usage - Essential Contact
+
+
+```hcl
+data "google_project" "project" {
+  provider = google-beta
+}
+
+resource "google_essential_contacts_contact" "contact" {
+  provider = google-beta
+  parent = data.google_project.project.id
+  email = "[email protected]"
+  language_tag = "en-GB"
+  notification_category_subscriptions = ["ALL"]
+}
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+
+* `email` -
+  (Required)
+  The email address to send notifications to. This does not need to be a Google account.
+
+* `notification_category_subscriptions` -
+  (Required)
+  The categories of notifications that the contact will receive communications for.
+
+* `parent` -
+  (Required)
+  The resource to save this contact for. Format: organizations/{organization_id}, folders/{folder_id} or projects/{project_id}
+
+
+- - -
+
+
+* `language_tag` -
+  (Optional)
+  The preferred language for notifications, as a ISO 639-1 language code. See Supported languages for a list of supported languages.
+
+
+## Attributes Reference
+
+In addition to the arguments listed above, the following computed attributes are exported:
+
+* `id` - an identifier for the resource with format `{{name}}`
+
+* `name` -
+  The identifier for the contact. Format: {resourceType}/{resource_id}/contacts/{contact_id}
+
+
+## Timeouts
+
+This resource provides the following
+[Timeouts](/docs/configuration/resources.html#timeouts) configuration options:
+
+- `create` - Default is 4 minutes.
+- `update` - Default is 4 minutes.
+- `delete` - Default is 4 minutes.
+
+## Import
+
+
+Contact can be imported using any of these accepted formats:
+
+```
+$ terraform import google_essential_contacts_contact.default {{name}}
+```

website/google.erb

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     </ul>
     </li>
 
+    <li>
+    <a href="#">Essential Contacts</a>
+    <ul class="nav">
+      <li>
+        <a href="#">Resources</a>
+        <ul class="nav nav-auto-expand">
+
+          <li>
+          <a href="/docs/providers/google/r/essential_contacts_contact.html">google_essential_contacts_contact</a>
+          </li>
+
+        </ul>
+      </li>
+    </ul>
+    </li>
+
     <li>
     <a href="#">Filestore</a>
     <ul class="nav">