React-Assignment-6

 Create simple User management app and perform 

                1. Add a new User in AddUser component. ( userObj = { name:"xxx", email :"xxxx"} ) .

Note: "username" should be unique. When we try to add new user, first it should check a user is already exists  . If username already exists , it should render"Duplicate username"in "AddUser" component.

                2.  Display Users list in a table (UsersList component)

                2. Delete  an existing User from table (Provide a separate delete button for each row)

NOTE: When a user is either added or removed, the User count( in UserCount component) should reflect count of remaining users.