ASP.NET CORE 2.0 AppRole Management

Question

Is there any View Model and CSHTML example of how to manage Add/Edit/Delete Roles from a User.

 

I have read that you can programatically register user and add Roles using

public static async Task CreateUserRoles(IServiceProvider serviceProvider)
{
var RoleManager = serviceProvider.GetRequiredService<RoleManager<IdentityRole>>();
var UserManager = serviceProvider.GetRequiredService<UserManager<ApplicationUser>>();
IdentityResult roleResult;
//Adding Addmin Role
var roleCheck = await RoleManager.RoleExistsAsync("Admin");
if (!roleCheck)
{
//create the roles and seed them to the database
roleResult = await RoleManager.CreateAsync(new IdentityRole("Admin"));
}
roleCheck = await RoleManager.RoleExistsAsync("Sales");
if (!roleCheck)
{
//create the roles and seed them to the database
roleResult = await RoleManager.CreateAsync(new IdentityRole("Sales"));
}
roleCheck = await RoleManager.RoleExistsAsync("Customer");
if (!roleCheck)
{
//create the roles and seed them to the database
roleResult = await RoleManager.CreateAsync(new IdentityRole("Customer"));
}
//Assign Admin role to the main User here we have given our newly loregistered login id for Admin management
ApplicationUser user = await UserManager.FindByEmailAsync("[email protected]");
var User = new ApplicationUser();
await UserManager.AddToRoleAsync(user, "Admin");
}

However when the application is running I need an application admin to administer Application Roles with users.