feat(Iterable Node): Add support for EDC and USDC selection (#10908)

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

@@ -1,4 +1,9 @@
-import type { ICredentialType, INodeProperties } from 'n8n-workflow';
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
 
 export class IterableApi implements ICredentialType {
 	name = 'iterableApi';
@@ -15,5 +20,38 @@ export class IterableApi implements ICredentialType {
 			typeOptions: { password: true },
 			default: '',
 		},
+		{
+			displayName: 'Region',
+			name: 'region',
+			type: 'options',
+			options: [
+				{
+					name: 'EDC',
+					value: 'https://api.eu.iterable.com',
+				},
+				{
+					name: 'USDC',
+					value: 'https://api.iterable.com',
+				},
+			],
+			default: 'https://api.iterable.com',
+		},
 	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				Api_Key: '={{$credentials.apiKey}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '={{$credentials?.region}}',
+			url: '/api/webhooks',
+			method: 'GET',
+		},
+	};
 }