feat(todoist): add app, authentication, docs (#826)

packages/backend/src/apps/todoist/common/add-auth-header.ts

@@ -0,0 +1,12 @@
+import { TBeforeRequest } from '@automatisch/types';
+
+const addAuthHeader: TBeforeRequest = ($, requestConfig) => {
+  if ($.auth.data?.apiToken) {
+    const authorizationHeader = `Bearer ${$.auth.data.apiToken}`;
+    requestConfig.headers.Authorization = authorizationHeader;
+  }
+
+  return requestConfig;
+};
+
+export default addAuthHeader;