feat: Access the internal scope of Parse Server using the new maintenanceKey; the internal scope contains unofficial and undocumented fields (prefixed with underscore _) which are used internally by Parse Server; you may want to manipulate these fields for out-of-band changes such as data migration or correction tasks; changes within the internal scope of Parse Server may happen at any time without notice or changelog entry, it is therefore recommended to look at the source code of Parse Server to understand the effects of manipulating internal fields before using the key; it is discouraged to use the maintenanceKey for routine operations in a production environment; see [access scopes](https://github.com/parse-community/parse-server#access-scopes) (#8212)

BREAKING CHANGE: Fields in the internal scope of Parse Server (prefixed with underscore `_`) are only returned using the new `maintenanceKey`; previously the `masterKey` allowed reading of internal fields; see [access scopes](https://github.com/parse-community/parse-server#access-scopes) for a comparison of the keys' access permissions (#8212)

spec/ParseUser.spec.js

@@ -3522,40 +3522,128 @@ describe('Parse.User testing', () => {
       });
   });
 
-  it('should not allow updates to hidden fields', done => {
+  it('should not allow updates to hidden fields', async () => {
     const emailAdapter = {
       sendVerificationEmail: () => {},
       sendPasswordResetEmail: () => Promise.resolve(),
       sendMail: () => Promise.resolve(),
     };
-
     const user = new Parse.User();
     user.set({
       username: 'hello',
       password: 'world',
       email: 'test@email.com',
     });
-
-    reconfigureServer({
+    await reconfigureServer({
       appName: 'unused',
       verifyUserEmails: true,
       emailAdapter: emailAdapter,
       publicServerURL: 'http://localhost:8378/1',
-    })
-      .then(() => {
-        return user.signUp();
-      })
-      .then(() => {
-        return Parse.User.current().set('_email_verify_token', 'bad').save();
-      })
-      .then(() => {
-        fail('Should not be able to update email verification token');
-        done();
-      })
-      .catch(err => {
-        expect(err).toBeDefined();
-        done();
-      });
+    });
+    await user.signUp();
+    user.set('_email_verify_token', 'bad', { ignoreValidation: true });
+    await expectAsync(user.save()).toBeRejectedWith(
+      new Parse.Error(Parse.Error.INVALID_KEY_NAME, 'Invalid field name: _email_verify_token.')
+    );
+  });
+
+  it('should allow updates to fields with maintenanceKey', async () => {
+    const emailAdapter = {
+      sendVerificationEmail: () => {},
+      sendPasswordResetEmail: () => Promise.resolve(),
+      sendMail: () => Promise.resolve(),
+    };
+    const user = new Parse.User();
+    user.set({
+      username: 'hello',
+      password: 'world',
+      email: 'test@example.com',
+    });
+    await reconfigureServer({
+      appName: 'unused',
+      maintenanceKey: 'test2',
+      verifyUserEmails: true,
+      emailVerifyTokenValidityDuration: 5,
+      accountLockout: {
+        duration: 1,
+        threshold: 1,
+      },
+      emailAdapter: emailAdapter,
+      publicServerURL: 'http://localhost:8378/1',
+    });
+    await user.signUp();
+    for (let i = 0; i < 2; i++) {
+      try {
+        await Parse.User.logIn(user.getEmail(), 'abc');
+      } catch (e) {
+        expect(e.code).toBe(Parse.Error.OBJECT_NOT_FOUND);
+        expect(
+          e.message === 'Invalid username/password.' ||
+            e.message ===
+              'Your account is locked due to multiple failed login attempts. Please try again after 1 minute(s)'
+        ).toBeTrue();
+      }
+    }
+    await Parse.User.requestPasswordReset(user.getEmail());
+    const headers = {
+      'X-Parse-Application-Id': 'test',
+      'X-Parse-Rest-API-Key': 'rest',
+      'X-Parse-Maintenance-Key': 'test2',
+      'Content-Type': 'application/json',
+    };
+    const userMaster = await request({
+      method: 'GET',
+      url: `http://localhost:8378/1/classes/_User`,
+      json: true,
+      headers,
+    }).then(res => res.data.results[0]);
+    expect(Object.keys(userMaster).sort()).toEqual(
+      [
+        'ACL',
+        '_account_lockout_expires_at',
+        '_email_verify_token',
+        '_email_verify_token_expires_at',
+        '_failed_login_count',
+        '_perishable_token',
+        'createdAt',
+        'email',
+        'emailVerified',
+        'objectId',
+        'updatedAt',
+        'username',
+      ].sort()
+    );
+    const toSet = {
+      _account_lockout_expires_at: new Date(),
+      _email_verify_token: 'abc',
+      _email_verify_token_expires_at: new Date(),
+      _failed_login_count: 0,
+      _perishable_token_expires_at: new Date(),
+      _perishable_token: 'abc',
+    };
+    await request({
+      method: 'PUT',
+      headers,
+      url: Parse.serverURL + '/users/' + userMaster.objectId,
+      json: true,
+      body: toSet,
+    }).then(res => res.data);
+    const update = await request({
+      method: 'GET',
+      url: `http://localhost:8378/1/classes/_User`,
+      json: true,
+      headers,
+    }).then(res => res.data.results[0]);
+    for (const key in toSet) {
+      const value = toSet[key];
+      if (update[key] && update[key].iso) {
+        expect(update[key].iso).toEqual(value.toISOString());
+      } else if (value.toISOString) {
+        expect(update[key]).toEqual(value.toISOString());
+      } else {
+        expect(update[key]).toEqual(value);
+      }
+    }
   });
 
   it('should revoke sessions when setting paswword with masterKey (#3289)', done => {