feat(groups): add fail-closed admission management

packages/minecraft/test/discord.test.ts

@@ -1,5 +1,25 @@
 import { describe, expect, it, vi } from "vitest";
-import { updateGuildNickname } from "../src/index";
+import { getGuildMemberIdentity, updateGuildNickname } from "../src/index";
+
+describe("Discord guild identity", () => {
+  it("reads the member username, global name, nickname, and immutable ID", async () => {
+    const request = vi.fn<typeof fetch>().mockResolvedValue(new Response(JSON.stringify({
+      nick: "Sam (Notch)",
+      user: { id: "987654321098765432", username: "samcraft", global_name: "Sam" },
+    }), { status: 200, headers: { "content-type": "application/json" } }));
+
+    await expect(getGuildMemberIdentity({
+      guildId: "123456789012345678",
+      discordUserId: "987654321098765432",
+      botToken: "secret",
+    }, request)).resolves.toEqual({
+      id: "987654321098765432",
+      username: "samcraft",
+      globalName: "Sam",
+      nickname: "Sam (Notch)",
+    });
+  });
+});
 
 describe("Discord nickname updates", () => {
   it("updates a member in the configured guild using bot authentication", async () => {