Fix test and linting

Author: timokoessler

library/agent/context/user.test.ts

@@ -119,7 +119,7 @@ t.test("it logs when setUser has invalid input", async () => {
   // @ts-expect-error Testing invalid input
   setUser(null);
   t.same(logger.getMessages(), [
-    "setUser(...) expects an object with 'id' and 'name' properties, found object instead.",
+    "setUser(...) can not be called with null or undefined.",
   ]);
 });
 

library/agent/context/user.ts

@@ -1,3 +1,4 @@
+/* eslint-disable max-lines-per-function */
 import { isPlainObject } from "../../helpers/isPlainObject";
 import { getInstance } from "../AgentSingleton";
 import type { User } from "../Context";