fix(core): Use correct scopes-separator when generating authorization urls (#6502)

packages/@n8n/client-oauth2/src/utils.ts

@@ -2,17 +2,21 @@
 /* eslint-disable @typescript-eslint/restrict-plus-operands */
 /* eslint-disable @typescript-eslint/no-unsafe-assignment */
 /* eslint-disable @typescript-eslint/no-explicit-any */
-import type { ClientOAuth2RequestObject } from './ClientOAuth2';
+import type { ClientOAuth2Options, ClientOAuth2RequestObject } from './ClientOAuth2';
 import { ERROR_RESPONSES } from './constants';
 
 /**
  * Check if properties exist on an object and throw when they aren't.
  */
-export function expects(obj: any, ...args: any[]) {
-	for (let i = 1; i < args.length; i++) {
-		const prop = args[i];
-		if (obj[prop] === null) {
-			throw new TypeError('Expected "' + prop + '" to exist');
+export function expects<Keys extends keyof ClientOAuth2Options>(
+	obj: ClientOAuth2Options,
+	...keys: Keys[]
+): asserts obj is ClientOAuth2Options & {
+	[K in Keys]: NonNullable<ClientOAuth2Options[K]>;
+} {
+	for (const key of keys) {
+		if (obj[key] === null || obj[key] === undefined) {
+			throw new TypeError('Expected "' + key + '" to exist');
 		}
 	}
 }
@@ -47,13 +51,6 @@ function toString(str: string | null | undefined) {
 	return str === null ? '' : String(str);
 }
 
-/**
- * Sanitize the scopes option to be a string.
- */
-export function sanitizeScope(scopes: string[] | string): string {
-	return Array.isArray(scopes) ? scopes.join(' ') : toString(scopes);
-}
-
 /**
  * Create basic auth header.
  */