Bit confused with the question but Laravel uses ID as default for dependency injection and changing it is easy: just change the routeKey in the model BUT in your instance, you're using the signed in user. So forgot the id!
<?php
namespace App\Http\Controllers;
class RandomController extends Controller {
public function index()
{
return view('profile');//use auth facade in blade.
}
}
In your routes use a middleware to prevent none authenticated users from reaching this method
<?php
Route::group('/loggedin', [
'middleware' => 'auth',
], function() {
Route::get('/profile', 'RandomController@index')->name('profile.index');
});
Now to redirect in your blade file use the route function, don't forget to clear your cache if you've cached your routes!
<h1>Hi! {{Auth::user()->name}}</h1>
<a href="{{route('profile.index')}}">View profile</a>
Because I used the name method on the Route I can pass that route name into the route function. Using php artisan route:list will list all your route parameters which is cool because it will also tell you the names and middlewares etc.
if I had a route which required a parameter; the route function accepts an array of params as the second parameter. route('profile.index', ['I_am_a_fake_param' => $user->id,]).
Let me know if you need help with anything else.
return redirect("profile/{$user_id}");