What is the proper way to handle API redirection

Hey guys, I am working on a project that uses React for the frontend and Laravel for the API endpoints which I am responsible for.

The logic is to redirect users to the dashboard on successful registration or login. The dashboard will be displaying all user info except the password of course.

Here's how I have setup the registration and login API endpoints using Passport

api.php

Route::post('register', 'BaseController@register');

Route::post('login', 'BaseController@login)

My BaseController methods are set up like this

public function register(Request $request)
{
    $validator = Validator::make($request->all(), [
        'firstname' => 'required',
        'lastname'  => 'required',
        'username'  => 'required|email',
        'password'  => 'required'
    ]);

    if ($validator->fails()) {
        return response()->json(['Error', $validator->errors()], 401);
    }

    $user = User::create([
        'firstname' => $request->firstname,
        'lastname'  => $request->lastname,
        'username'  => $request->username,
        'password'  => bcrypt($request->password)
    ]);

    $success['token'] = $user->createToken('Pramopro')->accessToken;

    return response()->json(['success' => $success, 'message' => 'You have successfully registered'], 200);
}

public function login() {
    if (Auth::attempt(['username' => request('username'), 'password' => request('password')])) {
        $user = Auth::user();
        $success['token'] = $user->createToken('Pramopro')->accessToken;

        return response()->json(['success' => $success, 'message' => 'You have succesfully signed in.'], 200);
    }
    else
    {
        return response()->json(['error' => 'Unauthorised'], 401);
    }
}

Both endpoints work fine and i get the token back.

My question is how do I set up the dashboard API so that on redirect the authenticated user details are sent in the response?