feature: signup and login work

utils/canned_responses.ts

@@ -0,0 +1,13 @@
+export const CANNED_RESPONSES: Record<string, () => Response> = {
+	permission_denied: (): Response => {
+		console.trace('denied');
+		return Response.json({
+			error: {
+				message: 'Permission denied.',
+				cause: 'permission_denied'
+			}
+		}, {
+			status: 400
+		});
+	}
+};