I'm pretty sure this game is just a phishing scam. I would recommend changing any password to accounts linked to that email or username that use the same password as the one you used for signup
Viewing post in Shadow Alchemy Monsters Academy comments
As you may have noticed, the application is in the development phase. That's why we have disabled login with real email accounts and provided the option to signup with a test account that is not linked to an email and uses dummy data.
Unfortunately, we did not anticipate that there would be a challenge accessing the application through embedded content.
Thanks for feedback we will try to make it playable from embeded here on Itch.io