provide /sessions endpoint to return json of the current sessions

apps/login/src/app/sessions/route.ts

@@ -0,0 +1,24 @@
+import { listSessions, server } from "@/lib/zitadel";
+import { SessionCookie, getAllSessions } from "@/utils/cookies";
+import { Session } from "@zitadel/server";
+import { NextRequest, NextResponse } from "next/server";
+
+async function loadSessions(ids: string[]): Promise<Session[]> {
+  const response = await listSessions(
+    server,
+    ids.filter((id: string | undefined) => !!id),
+  );
+
+  return response?.sessions ?? [];
+}
+
+export async function GET(request: NextRequest) {
+  const sessionCookies: SessionCookie[] = await getAllSessions();
+  const ids = sessionCookies.map((s) => s.id);
+  let sessions: Session[] = [];
+  if (ids && ids.length) {
+    sessions = await loadSessions(ids);
+  }
+
+  return NextResponse.json({ sessions }, { status: 500 });
+}