Please draw simple microservice architecture for this backend restfull api application:

There are a number of users in the System, which operates authentication and authorization processes of users.

The System may have one or more "Discussion"s that have fields such as "title", "state", "date", "owner" and "participants_list".

Each discussion has one or more "Task"s that have fields such as "title", "description", "created_time", "starting_time", "ending_time" and "state".

Tasks may have more than one "Comment"s that have fields such as "title", "context" and "sender".

If a task is not started by the predefined starting time, the system has to send an e-mail to the user. If a task is not finished by the predefined ending time, the system has to send an e-mail to the user.