feat(HTTP Request Node): New http request generic custom auth credential (#5798)

packages/nodes-base/credentials/HttpCustomAuth.credentials.ts

@@ -0,0 +1,28 @@
+/* eslint-disable n8n-nodes-base/cred-class-field-name-unsuffixed */
+/* eslint-disable n8n-nodes-base/cred-class-name-unsuffixed */
+import type { ICredentialType, INodeProperties } from 'n8n-workflow';
+
+export class HttpCustomAuth implements ICredentialType {
+	name = 'httpCustomAuth';
+
+	displayName = 'Custom Auth';
+
+	documentationUrl = 'httpRequest';
+
+	genericAuth = true;
+
+	icon = 'node:n8n-nodes-base.httpRequest';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'JSON',
+			name: 'json',
+			type: 'json',
+			required: true,
+			description: 'Use json to specify authentication values for headers, body and qs.',
+			placeholder:
+				'{ "headers": { "key" : "value" }, "body": { "key": "value" }, "qs": { "key": "value" } }',
+			default: '',
+		},
+	];
+}