Nit change

Author: wangmengyan95

src/__tests__/ParseUser-test.js

@@ -397,10 +397,8 @@ describe('ParseUser', () => {
 
       deauthenticate() {}
     };
-    
-    ParseUser.logInWith(provider, {}).then(() => {
 
-    }, (error) => {
+    ParseUser.logInWith(provider, {}).then(null, (error) => {
       expect(error.code).toBe(ParseError.ACCOUNT_ALREADY_LINKED);
       expect(error.message).toBe('Another user is already linked to this facebook id.');
       done();