  Monolithic applications used to be considered the standard for software
development. However, due to the rapid evolution of technology and the
increasing demand for scalability and flexibility, these applications have
become increasingly inadequate for contemporary environment. In response to
these challenges, developers have begun to adopt a microservice (MS)
architecture, which offers a modular approach to software creation. However,
this transition requires to rethink the enablement system to meet the new
requirements. Two MS architectures can be deployed: a centralized or
decentralized architecture. Based on the requirements of the application's
users, a centralized authorization management architecture was chosen. The
purpose of this study is to explain the migration from a Role- Based Access
Control (RBAC) authorization system to a centralized microservice authorization
architecture. The migration is carried out in two stages: 1) Creation of an
authorization microservice 2) Abandonment of RBAC
