Groups endpoint - Githubissues

Expandable section for all the groups.

[x] Sections title should be the name of the group
[x] Section content should be a list of the users that are in the group
[x] Every section should include a button to add a new user to it
[ ] Sort users based on name
[x] Every row should contain the name of the user, a button to remove the user from the group

rekaehreth / HKAdmin-service