✨ Add PostHog Node (#1440)

* ✨ PostHog Node

* ⚡ Minor improvements to PostHog Node

Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>

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

@@ -0,0 +1,23 @@
+import {
+	ICredentialType,
+	NodePropertyTypes,
+} from 'n8n-workflow';
+
+export class PostHogApi implements ICredentialType {
+	name = 'postHogApi';
+	displayName = 'PostHog API';
+	properties = [
+		{
+			displayName: 'URL',
+			name: 'url',
+			type: 'string' as NodePropertyTypes,
+			default: 'https://app.posthog.com',
+		},
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string' as NodePropertyTypes,
+			default: '',
+		},
+	];
+}