files

src/store/UserDetails.js

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+import { createSlice } from "@reduxjs/toolkit";
+
+const initialState = {
+  userDetails: {},
+};
+
+export const userSlice = createSlice({
+  name: "userDetails",
+  initialState,
+  reducers: {
+    updateUserDetails: (state, action) => {
+      state.userDetails = { ...action.payload };
+    },
+  },
+});
+
+// Action creators are generated for each case reducer function
+export const { updateUserDetails } = userSlice.actions;
+
+export default userSlice.reducer;

src/store/store.js

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+import { configureStore } from "@reduxjs/toolkit";
+
+import userDetailReducer from "./UserDetails";
+
+export default configureStore({
+  reducer: {
+    userDetails: userDetailReducer,
+  },
+});