userSlice

import { createSlice, createAsyncThunk } from "@reduxjs/toolkit";
import LoginService from "../../Services/Login.service";

export const userRegister = createAsyncThunk(
  "users/register",
  async (params) => {
    try {
      const { registerForm } = params;
      const { data } = await LoginService.register(registerForm);

      return data;
    } catch (error) {
    }
  }
);

const initialState = {
  userData: {},
  errorResponse: null,
  status: "idle",
};

export const userSlice = createSlice({
  name: "User",
  initialState,
  reducers: {},
  extraReducers: {
    [userRegister.pending]: (state, action) => {
      state.status = "loading";
    },
    [userRegister.fulfilled]: (state, action) => {
      state.status = "succeeded";
      state.userData = action.payload;
    },
    [userRegister.error]: (state, action) => {
      state.status = "failed";
      state.errorResponse = action.payload;
    },
  },
});

export default userSlice.reducer;

Login.service.js

import axios from "axios";

const API = axios.create({ baseURL: 'http://localhost:3001'});

const LoginService = {

    register: async (registerData ) => {
         await API.post('/users/register', registerData)
    } 
};

export default LoginService;

Hi.I try add register feature to my app. But when i submit register form, the datas is saved to the database without any problems. But this line const data = await LoginService.register(registerForm); doesnt work data is undefined but when i same post request in postman i get response data the way i want.