feat(invoice-ninja): add invoice ninja integration

packages/backend/src/apps/invoice-ninja/auth/index.ts

@@ -0,0 +1,33 @@
+import verifyCredentials from './verify-credentials';
+import isStillVerified from './is-still-verified';
+
+export default {
+  fields: [
+    {
+      key: 'apiToken',
+      label: 'API Token',
+      type: 'string' as const,
+      required: true,
+      readOnly: false,
+      value: null,
+      placeholder: null,
+      description:
+        'Tokens can be created in the v5 app on Settings > Account Management',
+      clickToCopy: false,
+    },
+    {
+      key: 'instanceUrl',
+      label: 'Invoice Ninja instance URL (optional)',
+      type: 'string' as const,
+      required: false,
+      readOnly: false,
+      value: null,
+      placeholder: null,
+      description: "Leave this field blank if you're using hosted platform.",
+      clickToCopy: true,
+    },
+  ],
+
+  verifyCredentials,
+  isStillVerified,
+};