A user-friendly user management page for apollo portal

[nobodyiam]

Is your feature request related to a problem? Please describe.
Currently, we have a simple user management page for apollo portal(as shown below). However, it's not user-friendly, e.g. there is no way to know how many users are currently in the system and whether they are enabled or not.

Describe the solution you'd like
Provide a user-friendly user management page that shows all the users in the system and the system admin could choose some user to edit. There should also be an Add button to add a new user.

Add User

Name	DisplayName	Email	Enabled	Operation
apollo	admin user	apollo@acme.com	Enabled	Edit
test	test user	test@acme.com	Disabled	Edit

In the edit page, the system admin could also toggle the enable status to enable/disable the user.

Describe alternatives you've considered
I'm open to this and any ideas or suggestions are welcome.

[aexftf]

好

[nobodyiam]

assigned to student 张重阳, see https://summer-ospp.ac.cn/#/org/orgdetail/c4cc2271-6627-4965-a5ec-37d5ac3c0ad8/