mesh.test.ts: the consumer's login carries its slug

test/integration/mesh.test.ts

@@ -372,7 +372,7 @@ test("a credential reaches both ends and the mesh holds neither", { skip, timeou
   assert.match(filled, /^PGPASSWORD=.+$/m, `the password was never put in:\n${filled}`);
   assert.ok(filled.includes(`PGPASSWORD=${onConsumer}`),
     `the file holds a different password from the credential file:\n${filled}`);
-  assert.match(filled, /^PGUSER=mesh_laptop_meshboard$/m,
+  assert.match(filled, /^PGUSER=mesh_laptop_board$/m,
     `the consumer was not told what name to present:\n${filled}`);
   assert.match(filled, /^PGPORT=5432$/m, `the port did not arrive as a port:\n${filled}`);
   assert.doesNotMatch(filled, /\$\{/,