UserForm: ajout retour de validation d'API

frontend/src/reducers/users.reducers.js

@@ -0,0 +1,24 @@
+import { CREATE_USER_FAILURE } from "../actions/user.actions";
+
+const initialState = {
+    byId: {},
+    createUserForm: { errorCode: null },
+};
+
+export function usersReducer(state = initialState, action) {
+    switch(action.type) {
+        case CREATE_USER_FAILURE:
+            return handleCreateUserFailure(state, action);
+    };
+    return state;
+}
+
+function handleCreateUserFailure(state, { error }) {
+    return {
+        ...state,
+        createUserForm: {
+            ...state.createUserForm,
+            errorCode: error.code,
+        }
+    };
+}