User Authentication and Access Control is a critical feature designed to ensure that only authorized users can access specific data and services within a centralized oracle system. This feature employs various authentication methods, such as passwords, multi-factor authentication (MFA), and biometric verification, to confirm user identities. Additionally, it implements role-based access control (RBAC) to manage user permissions effectively, ensuring that users can only access the resources necessary for their roles. The purpose of this feature is to safeguard sensitive information and maintain the integrity of the oracle system by preventing unauthorized access and potential data breaches.