fix(core): Allow ignoring SSL issues on generic oauth2 credentials (#6702)

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

@@ -63,14 +63,15 @@ export function auth(username: string, password: string): string {
  */
 export function getRequestOptions(
 	{ url, method, body, query, headers }: ClientOAuth2RequestObject,
-	options: any,
+	options: ClientOAuth2Options,
 ): ClientOAuth2RequestObject {
 	const rOptions = {
 		url,
 		method,
 		body: { ...body, ...options.body },
 		query: { ...query, ...options.query },
-		headers: { ...headers, ...options.headers },
+		headers: headers ?? {},
+		ignoreSSLIssues: options.ignoreSSLIssues,
 	};
 	// if request authorization was overridden delete it from header
 	if (rOptions.headers.Authorization === '') {