UserForm: ajout retour de validation d'API

frontend/src/sagas/user/root.saga.js

@@ -0,0 +1,9 @@
+import { all, takeLatest } from 'redux-saga/effects';
+import { CREATE_USER_REQUEST } from '../../actions/user.actions';
+import { createUserSaga } from './user.saga';
+
+export function* rootSaga() {
+	yield all([
+		takeLatest(CREATE_USER_REQUEST, createUserSaga),
+	]);
+}