✨ Pusher service basis

DysonNetwork.Pass/Auth/AuthServiceGrpc.cs

@@ -0,0 +1,27 @@
+using DysonNetwork.Shared.Proto;
+using Grpc.Core;
+using Microsoft.EntityFrameworkCore;
+
+namespace DysonNetwork.Pass.Auth;
+
+public class AuthServiceGrpc(AuthService authService, AppDatabase db) : Shared.Proto.AuthService
+{
+    public async Task<Shared.Proto.AuthSession> Authenticate(AuthenticateRequest request, ServerCallContext context)
+    {
+        if (!authService.ValidateToken(request.Token, out var sessionId))
+        {
+            throw new RpcException(new Status(StatusCode.Unauthenticated, "Invalid token."));
+        }
+
+        var session = await db.AuthSessions
+            .AsNoTracking()
+            .FirstOrDefaultAsync(s => s.Id == sessionId);
+
+        if (session == null)
+        {
+            throw new RpcException(new Status(StatusCode.NotFound, "Session not found."));
+        }
+
+        return session.ToProtoValue();
+    }
+}