Appathon Registration Problem

Hi there! Hope you all are having a good day!
I wanted to give my name for Appathon 2023, and when i try to register, it prompts me to login. But when I give the relevant information (username and password) it says it's wrong. I checked it many times and even though the information I provided is correct, it's saying it is wrong!
Can anyone help?
Thanks in advance!