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Up until now, your application has essentially been a single-user application. Although your APEX application has been created with the ability to support many users (and the underlying Oracle database can support hundreds of users simultaneously), you have not taken advantage of this capability.
In this last chapter of the tutorial section of this book, you will explore how to define users and security for your application. As with other chapters, the knowledge you will gain in this brief introduction will give you the ability to start to design and implement robust security features in your own applications.