✨ Add Customer.io-Node (#833)

* 🚧 Descriptions, node function, generic function changes

* ✅ Finished functionality, added icon

* ⚡ Added new campaign operations, acommodated for 2 different authentications

* ⚡ Fixed number defaults not being numbers but empty strings

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

@@ -10,11 +10,26 @@ export class CustomerIoApi implements ICredentialType {
 	documentationUrl = 'customerIo';
 	properties = [
 		{
-			displayName: 'App API Key',
-			name: 'apiKey',
+			displayName: 'Tracking API Key',
+			name: 'trackingApiKey',
 			type: 'string' as NodePropertyTypes,
 			default: '',
+			description: 'Required for tracking API.',
+			required: true
+		},
+		{
+			displayName: 'Tracking Site ID',
+			name: 'trackingSiteId',
+			type: 'string' as NodePropertyTypes,
+			default: '',
+			description: 'Required for tracking API.'
+		},
+		{
+			displayName: 'App API Key',
+			name: 'appApiKey',
+			type: 'string' as NodePropertyTypes,
+			default: '',
+			description: 'Required for App API.'
 		},
-
 	];
 }