1. Challenges uses a custom 'serializing' algorithm.2. Stores length of array/string in a single byte, length allowed <= 256.3. 256 in a single byte = 0.4. Enter email of size = 256, during storage it would be treated as '0' byte and the email string would be used to parse other fields.5. Forge a credentials array inside email.6. Register with this email and simply login to get the flag