Redux React, how to set state, from form, inside a function - reactjs

Question

I am learning Redux. I cannot figure out how to set state.
I need to set state (I'm assuming with useDispatch) by using a login form. On the component Fake1, I am able to console.log the "user" passed with useSelector. If i hardcode a change in state on user.js ({ i.e., username: "beanbag", password: "122345" }), the change in state appears on Fake1, telling me that the mechanics of my setup are good, and that the problem is that state is not being set inside loginOnSubmit().
My code:
const initialStateValue = { username: "", password: "" };
export const userSlice = createSlice({
name: "user",
initialState: { value: initialStateValue },
reducers: {
login: (state, action) => {
state.value = action.payload;
},
logout: (state) => {
state.value = initialStateValue;
},
},
});
export const { login, logout } = userSlice.actions;
export default userSlice.reducer;
import React, { useState, useEffect } from "react";
import { useNavigate } from "react-router-dom";
import Visibility from "#mui/icons-material/Visibility";
import VisibilityOff from "#mui/icons-material/VisibilityOff";
import InputAdornment from "#mui/material/InputAdornment";
import IconButton from "#mui/material/IconButton";
import Input from "#mui/material/Input";
import Button from "#mui/material/Button";
import LoginIcon from "#mui/icons-material/Login";
import AddCircleOutlineIcon from "#mui/icons-material/AddCircleOutline";
import Stack from "#mui/material/Stack";
import "./LoginForm.css";
import { useDispatch } from "react-redux";
import { login } from "../features/user";
function LoginForm() {
const [user, setUser] = useState(null);
const [loginUsername, setLoginUsername] = useState("");
const [loginError, setLoginError] = useState([]);
const [isAuthenticated, setIsAuthenticated] = useState(false);
const [values, setValues] = useState({
password: "",
showPassword: false,
});
const dispatch = useDispatch();
const navigate = useNavigate();
const handleChange = (prop) => (event) => {
setValues({ ...values, [prop]: event.target.value });
};
const handleClickShowPassword = () => {
setValues({
...values,
showPassword: !values.showPassword,
});
};
const handleMouseDownPassword = (event) => {
event.preventDefault();
};
// useEffect(() => {
// fetch("/authorize_user")
// .then((res) => res.json())
// .then(setUser);
// }, []);
const loginOnSubmit = (e) => {
e.preventDefault();
const newUser = {
username: loginUsername,
password: values.password,
};
// dispatch(login({username: loginUsername, password: values.password}))
fetch("/login", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify(newUser),
}).then((res) => {
if (res.ok) {
res.json().then((newUser) => {
setUser(newUser);
setIsAuthenticated(true);
setLoginUsername("");
dispatch(login({ newUser }));
navigate("/fake1");
});
} else {
res.json().then((json) => setLoginError(json.error));
}
});
};
const handleSignupRoute = () => {
navigate("/signup");
};
return (
<form onSubmit={loginOnSubmit}>
<div>
<br></br>
<Input
className="test1"
value={loginUsername}
onChange={(e) => setLoginUsername(e.target.value)}
type="text"
label="Username"
placeholder="Username"
/>
<br></br>
<br></br>
<Input
id="standard-adornment-password"
type={values.showPassword ? "text" : "password"}
value={values.password}
// onChange={(e) => setValues(e.target.value)}
onChange={handleChange("password")}
placeholder="Password"
endAdornment={
<InputAdornment position="end">
<IconButton
aria-label="toggle password visibility"
onClick={handleClickShowPassword}
onMouseDown={handleMouseDownPassword}
>
{values.showPassword ? <VisibilityOff /> : <Visibility />}
</IconButton>
</InputAdornment>
}
/>
<br></br>
<br></br>
<br></br>
<div className="test2">
<Stack direction="row" spacing={2}>
<Button
type="submit"
variant="outlined"
endIcon={<LoginIcon />}
className="btn-login"
>
Login
</Button>
<Button
onClick={handleSignupRoute}
variant="outlined"
endIcon={<AddCircleOutlineIcon />}
className="btn-signup"
>
Signup
</Button>
</Stack>
<br></br>
<br></br>
</div>
</div>
</form>
);
}
export default LoginForm;
import React from 'react'
import {useSelector} from 'react-redux'
const Fake1 = () => {
const user = useSelector(state => state.user.value)
console.log(user)
return (
<div>Fake1</div>
)
}
export default Fake1