GraphQL User: public_email instead of email

app/graphql/types/user_type.rb

@@ -19,7 +19,8 @@ module Types
     field :state, Types::UserStateEnum, null: false,
           description: 'State of the user'
     field :email, GraphQL::STRING_TYPE, null: true,
-          description: 'User email'
+          description: 'User email', method: :public_email,
+          deprecated: { reason: 'Use public_email', milestone: '13.7' }
     field :public_email, GraphQL::STRING_TYPE, null: true,
           description: "User's public email"
     field :avatar_url, GraphQL::STRING_TYPE, null: true,

changelogs/unreleased/security-290-graphql-exposed-email.yml

+---
+title: 'GraphQL User: do not expose email if set to private'
+merge_request:
+author:
+type: security

doc/api/graphql/reference/gitlab_schema.graphql

@@ -23295,9 +23295,9 @@ type User {
   avatarUrl: String
 
   """
-  User email
+  User email. Deprecated in 13.7: Use public_email
   """
-  email: String
+  email: String @deprecated(reason: "Use public_email. Deprecated in 13.7")
 
   """
   Group count for the user. Available only when feature flag `user_group_counts` is enabled

doc/api/graphql/reference/gitlab_schema.json

@@ -67704,7 +67704,7 @@
             },
             {
               "name": "email",
-              "description": "User email",
+              "description": "User email. Deprecated in 13.7: Use public_email",
               "args": [
 
               ],
@@ -67713,8 +67713,8 @@
                 "name": "String",
                 "ofType": null
               },
-              "isDeprecated": false,
-              "deprecationReason": null
+              "isDeprecated": true,
+              "deprecationReason": "Use public_email. Deprecated in 13.7"
             },
             {
               "name": "groupCount",

doc/api/graphql/reference/index.md

@@ -3487,7 +3487,7 @@ Autogenerated return type of UpdateSnippet.
 | `assignedMergeRequests` | MergeRequestConnection | Merge Requests assigned to the user |
 | `authoredMergeRequests` | MergeRequestConnection | Merge Requests authored by the user |
 | `avatarUrl` | String | URL of the user's avatar |
-| `email` | String | User email |
+| `email` **{warning-solid}** | String | **Deprecated:** Use public_email. Deprecated in 13.7 |
 | `groupCount` | Int | Group count for the user. Available only when feature flag `user_group_counts` is enabled |
 | `groupMemberships` | GroupMemberConnection | Group memberships of the user |
 | `id` | ID! | ID of the user |

spec/requests/api/graphql/user_query_spec.rb

@@ -82,7 +82,7 @@ RSpec.describe 'getting user information' do
             'username' => presenter.username,
             'webUrl' => presenter.web_url,
             'avatarUrl' => presenter.avatar_url,
-            'email' => presenter.email,
+            'email' => presenter.public_email,
             'publicEmail' => presenter.public_email
           ))