fixed example about custom asynch validation
fixed example about custom asynch validation

PhilippSpo/core,evgenTraytyak/core,ShawnOceanHu/core,logankoester/core,rawGem/ua-core,rawGem/aus-core,jxm262/core,challett/core,meteor-useraccounts/core,lucaslizama/core,gevou/core,phocks/core,evgenTraytyak/core,dandv/core,jonxduo/core,niole/core,niole/core,lucaslizama/core,jjeffwarner/core,phocks/core,abernix/meteor-useraccounts-core,gwendall/core,meteor-useraccounts/core,fpoirier1/core,jjeffwarner/core,gevou/core,logankoester/core