Basic security backend including user management and some general utilities for ASP.NET Core applications
A basic sample application is available here RService
As a real and working client application you may check the RMuseum project at GanjoorService
If you are upgrading from a version prior to 1.2.2 you should add these additional lines to your program.cs:
//workspace service
builder.Services.AddTransient<IWorkspaceService, WorkspaceService>();
//workspace role service (you actually need to derive your own class from WorkspaceRolesServiceBase to have you own GetSecurableItems)
builder.Services.AddTransient<IWorkspaceRolesService, WorkspaceRolesServiceBase>();