使用 IS 5.3.0，您可以找到给定用户的所有登录会话.要做到这一点，您需要为登录流程编写一个拦截器，并检查该用户是否已经有登录会话 - 如果是，则身份验证失败.

With IS 5.3.0 you can find all the login sessions of a given user. To get this done you need to write an interceptor for the login flow and check whether that user has a login session already - and if so fail the authentication.