N8N-4134 Add AWS cred testing and http custom calls with credentials (#3924)

* ✨ Add Aws testing and http custom api

packages/nodes-base/nodes/Aws/Textract/GenericFunctions.ts

@@ -16,6 +16,7 @@ import {
 import {
 	ICredentialDataDecryptedObject,
 	ICredentialTestFunctions,
+	IHttpRequestOptions,
 	NodeApiError,
 	NodeOperationError,
 } from 'n8n-workflow';
@@ -46,30 +47,20 @@ export async function awsApiRequest(
 ): Promise<any> {
 	const credentials = await this.getCredentials('aws');
 
-	// Concatenate path and instantiate URL object so it parses correctly query strings
-	const endpoint = new URL(getEndpointForService(service, credentials) + path);
-
-	// Sign AWS API request with the user credentials
-	const signOpts = { headers: headers || {}, host: endpoint.host, method, path, body } as Request;
-	const securityHeaders = {
-		accessKeyId: `${credentials.accessKeyId}`.trim(),
-		secretAccessKey: `${credentials.secretAccessKey}`.trim(),
-		sessionToken: credentials.temporaryCredentials
-			? `${credentials.sessionToken}`.trim()
-			: undefined,
-	};
-
-	sign(signOpts, securityHeaders);
-
-	const options: OptionsWithUri = {
-		headers: signOpts.headers,
+	const requestOptions = {
+		qs: {
+			service,
+			path,
+		},
 		method,
-		uri: endpoint.href,
-		body: signOpts.body,
-	};
+		body,
+		url: '',
+		headers,
+		region: credentials?.region as string,
+	} as IHttpRequestOptions;
 
 	try {
-		return await this.helpers.request!(options);
+		return await this.helpers.requestWithAuthentication.call(this, 'aws', requestOptions);
 	} catch (error) {
 		if (error?.response?.data || error?.response?.body) {
 			const errorMessage = error?.response?.data || error?.response?.body;