In the past 48 hours, we have experienced very heavy traffic, which was double more than our server can afford. This resulted in process delay of servers and many users experienced unsuccessful sign in/up and related problems. We are sorry for the inconvenience and have worked in the problem in the past two days. Now all problems are solved and we apologize again for this accident. Please feel free to contact us if you have any questions in the future at email@example.com. We hope you enjoy using our app and we would like to hear from you. Thanks for your support!