Initial commit

Services/Auth/IUserService.cs

@@ -0,0 +1,16 @@
+using System.Security.Claims;
+using SharepointToolbox.Web.Core.Models;
+
+namespace SharepointToolbox.Web.Services.Auth;
+
+public interface IUserService
+{
+    /// <summary>Auto-provision on first OIDC login; update LastLogin on subsequent logins.
+    /// First user ever becomes Admin automatically.</summary>
+    Task<AppUser> ProvisionAsync(ClaimsPrincipal principal);
+
+    Task<AppUser?> GetByEmailAsync(string email);
+    Task<IReadOnlyList<AppUser>> GetAllAsync();
+    Task UpdateRoleAsync(string userId, UserRole role);
+    Task DeleteAsync(string userId);
+}