laravel passport giving Unauthenticated error

i am using laravel passport but when i try to hit my post route that gives me user data its giving me error like

{"message":"Unauthenticated."}

here is my controller method

public function getDetails()
    {
        $user = Auth::user();
        return response()->json(['success' => $user], $this->successStatus);
    }

api.php

Route::post('register', 'API\PassportController@register')-

>name('register');
Route::post('login', 'API\PassportController@login')->name('login');


//Route::post('details', 'API\PassportController@getDetails')->middleware('auth:api');

Route::group(['middleware' => 'auth:api'], function(){
 Route::get('user', 'API\PassportController@user');
 Route::post('details', 'API\PassportController@getDetails');

});

screenshot of postmen

[![enter image description here][1]][1]

please let me know what inputs you want from my side

via Chebli Mohamed