We have 89 awesome Ninjas and 74 challenges and counting...

We store only 1 record about you - the SHA3 hash form of your email. No first name, last name, or other personally identifiable information is stored 'coz we hate data leakage incident as much as you do. Below is a snapshot of what looks like in the database:

Just one thing to be aware - if you changed your primary email in LinkedIn, your record here would be treated as a new user.