In this paperwork service for authentication, authorization, and user management has been designed and developed. The purpose of this work is to simplify the configuration of user security in web and mobile applications with a ready-made solution. The service can be implemented as a separate server on the Internet—you will be able to use it right after registering a client this method does not require the use of your resources, but it is less secure, especially for applications that keep vulnerable data. Still, the best and the most secure option is to download the source code and run the service on the local network. In this case, it will be only accessible to other applications or microservices in the case of microservice architecture