Creating a Backend API with Role-Based Access Control (RBAC) at the Fine Level

Create and put into use a secure backend API that allows for precise role-based access control (RBAC). Each of the three main roles in the system—Admin, User, and Guest—must have precisely defined and adjustable permissions.

Prerequisites:

• Describe a scalable RBAC approach that permits the assignment of permissions to both individual users and roles.
• Use request interceptors or middleware to impose permission checks on each protected endpoint.
• Make it so that guests have restricted or read-only access, users have limited operational access, and administrators have complete access.
• Provide dynamic permission updates that don’t necessitate system reconfiguration.
• Give specific instances of API endpoint protection that illustrate the enforcement of roles and permissions.
• Adhere to security best practices, such as error handling, input validation, and token-based authentication (like JWT).
• Make sure that the architecture is easily expandable for new roles or permissions, modular, and maintainable.