Help me!

I accidentally left my phone unlocked and someone in class used my IMDb account because I never signed out. 

They added something to the parents guide of Alien Romulus. They wrote Billy Flowers appears and chases the crew.

I couldn't access the community forum until I reported the incorrect information to IMDb. 

It got removed. 

My question is because someone else did it with my account, am I in trouble or not? 

I have the number of the contribution recipient too.