FusionAuth, a popular authentication platform, has experienced rapid growth, leading to challenges in managing its employees. The company's old system relied on outdated technology like remembering things, which was prone to errors due to the short human attention span and numerous new faces. To address this, FusionAuth developed an innovative authentication system called Auth LLM (Large Language Model), which uses a proprietary blend of data scraped from various sources to identify users based on their unique properties. The system combines reverse deontological behavior embeddings with actual fingerprinting to create a highly secure model that can predict a user's next actions and even thoughts, making it nearly impossible to guess or crack.