diff --git a/spec/RestWrite.handleAuthData.spec.js b/spec/RestWrite.handleAuthData.spec.js
new file mode 100644
index 0000000000..b9c677f43c
--- /dev/null
+++ b/spec/RestWrite.handleAuthData.spec.js
@@ -0,0 +1,67 @@
+describe('RestWrite.handleAuthData', () => {
+  const MOCK_USER_ID = 'mockUserId';
+  const MOCK_ACCESS_TOKEN = 'mockAccessToken123';
+
+  const createMockUser = () => ({
+    id: MOCK_USER_ID,
+    code: 'C1',
+  });
+
+  const mockGooglePlayGamesAPI = () => {
+    mockFetch([
+      {
+        url: 'https://oauth2.googleapis.com/token',
+        method: 'POST',
+        response: {
+          ok: true,
+          json: () => Promise.resolve({ access_token: MOCK_ACCESS_TOKEN }),
+        },
+      },
+      {
+        url: `https://www.googleapis.com/games/v1/players/${MOCK_USER_ID}`,
+        method: 'GET',
+        response: {
+          ok: true,
+          json: () => Promise.resolve({ playerId: MOCK_USER_ID }),
+        },
+      },
+    ]);
+  };
+
+  const setupAuthConfig = () => {
+    return reconfigureServer({
+      auth: {
+        gpgames: {
+          clientId: 'validClientId',
+          clientSecret: 'validClientSecret',
+        }
+      },
+    });
+  };
+
+  beforeEach(async () => {
+    await setupAuthConfig();
+  });
+
+  it('should unlink provider via null', async () => {
+    mockGooglePlayGamesAPI();
+
+    const authData = createMockUser();
+    const user = await Parse.User.logInWith('gpgames', { authData });
+    const sessionToken = user.getSessionToken();
+
+    await user.fetch({ sessionToken });
+    const currentAuthData = user.get('authData') || {};
+
+    user.set('authData', {
+      ...currentAuthData,
+      gpgames: null,
+    });
+    await user.save(null, { sessionToken });
+
+    const updatedUser = await new Parse.Query(Parse.User).get(user.id, { useMasterKey: true });
+    const finalAuthData = updatedUser.get('authData') || {};
+
+    expect(finalAuthData.gpgames).toBeUndefined();
+  });
+});
diff --git a/src/RestWrite.js b/src/RestWrite.js
index 78dd8c8878..871d8d767b 100644
--- a/src/RestWrite.js
+++ b/src/RestWrite.js
@@ -538,7 +538,15 @@ RestWrite.prototype.ensureUniqueAuthDataId = async function () {
 };
 
 RestWrite.prototype.handleAuthData = async function (authData) {
-  const r = await Auth.findUsersWithAuthData(this.config, authData, true);
+  const withoutUnlinked = {};
+  for (const provider of Object.keys(authData)) {
+    if (authData[provider] === null || authData[provider] === undefined) {
+      continue;
+    }
+    withoutUnlinked[provider] = authData[provider];
+  }
+
+  const r = await Auth.findUsersWithAuthData(this.config, withoutUnlinked, true);
   const results = this.filteredObjectsByACL(r);
 
   const userId = this.getUserId();