The request is missing a required parameter, includes an invalid parameter value, includes a parameter more than once, or is otherwise malformed

Question

I am developing an auth api with laravel, passport and postman. I have seen related post but none of them solved my problem. If I try to send a request it shows me this error. I have tried all I can but it just displays this error

{
"error": "invalid_request",
"message": "The request is missing a required parameter, includes an invalid parameter value, includes a parameter more than once, or is otherwise malformed.",
"hint": "Check the `username` parameter"
}

my value for the application is

{
"grant_type" : "password",
"client_id" : "2",
"client_secret" : "fsDFrzGtmpMjoxWtplnvcmgKT3USzKFfKQu6alGF",
"email":"[email protected]",
"pssword" : "12345",
"scope" : "*"
}

api.php

<?php
 use Illuminate\Http\Request;
 Route::middleware('auth:api')->get('/user', function (Request $request) {
return $request->user();
});
Route::post('signup', 'SignUp@signUp');

auth.php

'guards' => [
    'web' => [
        'driver' => 'session',
        'provider' => 'users',
    ],
    'api' => [
        'driver' => 'passport',
        'provider' => 'users',
    ],
'providers' => [
    'users' => [
        'driver' => 'eloquent',
        'model' => App\User::class,
    ],

User.php

class User extends Authenticatable
  {
use Notifiable;
/**
 * The attributes that are mass assignable.
 *
 * @var array
 */
protected $fillable = [
    'name', 'email', 'password','vCode',
];
/**
 * The attributes that should be hidden for arrays.
 *
 * @var array
 */
protected $hidden = [
    'password', 'remember_token',
];

AuthServiceProvider.php

namespace App\Providers;
use Laravel\Passport\Passport;
use Illuminate\Support\Facades\Gate;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;
  class AuthServiceProvider extends ServiceProvider
{
    /**
     * The policy mappings for the application.
     *
     * @var array
     */
    protected $policies = [
        'App\Model' => 'App\Policies\ModelPolicy',
    ];
    /**
     * Register any authentication / authorization services.
     *
     * @return void
     */
    public function boot()
    {
        $this->registerPolicies();
        //
        Passport::routes();
    }
}

Please any solution will be really appreciated

Solution

you required 'username' field and passing value in postman parameter After all your code is absolutly right.nothing error.