Error when logging in dispatch?

Question

typescript

interface user:

export interface IUser {
    email: string;
    password: string;
    id: number;
    role: string;
    createdAt: Date;
}

user action:

export function setUser(user: IUser): IActionUser {
    return {
        type: "SET_USER",
        payload: user
    }
}

login handler:

const loginHandler = (event:any) => {
        return (dispatch:React.Dispatch<IActionUser>) => {
            event.preventDefault();

            axios({
                method: "POST",
                url: "http://localhost:5000/api/user/login",
                data: user,
                headers: {
                    "Content-Type": "application/json"
                }
            })
                .then((response) => {
                    Cookies.set("token", response.data.token);
                    history.push("/");
                    dispatch(setUser(user)); // error
                })
                .catch((err) => {
                    setAlert({
                        type: "error",
                        message: err.message
                    })
                })
        }
    }

error:

Argument of type 'void' is not assignable to parameter of type 'IActionUser'