Move projects to src; add Neutrino secret

src/RecNet.Application/Common/Security/ClaimsPrincipalExtensions.cs

@@ -0,0 +1,19 @@
+using System.Security.Claims;
+
+namespace RecNet.Application.Common.Security;
+
+public static class ClaimsPrincipalExtensions
+{
+    public static Guid GetProfileId(this ClaimsPrincipal user)
+    {
+        var value =
+            user.FindFirst("sub")?.Value ??
+            user.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+
+        if (!Guid.TryParse(value, out var profileId))
+            throw new UnauthorizedAccessException(
+                "Account id claim is missing or invalid.");
+
+        return profileId;
+    }
+}