TryGetCurrentUserId

Reads the caller's public identifier from the userId claim, falling back to ClaimTypes.NameIdentifier, and returns null when neither yields a usable value.

Use it where an anonymous caller is ordinary rather than exceptional. Where an identifier is required, GetCurrentUserId throws instead.

Usage

using System.Security.Claims;
using AlmightyShogun.AspNet.Auth;

Guid? identifier = principal.TryGetCurrentUserId();

Returns

The caller's public identifier, or null when the principal carries no well-formed one.

Type signature

public Guid? TryGetCurrentUserId();