With StripeClient I got error No API key provided

I have line with logging app.STRIPE_TEST_KEY

if ($appEnv == 'local' or $appEnv == 'dev') {
	\Log::info('-1 config(app.STRIPE_TEST_KEY)::' . print_r(config('app.STRIPE_TEST_KEY'), true));

and checking log file I see valid sk_test_NNN value in log line, but not inside of coreServiceFactory:Stripe\StripeClient object(I show it in my topic)

@mstdmstd If you want to inject the StripeClient into classes like that, then you’ll need to register it with the service container (with the key set):

class StripeServiceProvider extends ServiceProvider
{
    public function register()
    {
        $this->app->singleton(StripeClient::class, function () {
            return new StripeClient($this->app['config']['services.stripe.secret']);
        });
    }
}

Obviously don‘t forget to set a key in your config/services.php file with your Stripe API key:

'stripe' => [
    'key' => env('STRIPE_KEY'),
    'secret' => env('STRIPE_SECRET'),
],

Now when you type-hint StripeClient in a class, a well-formed instance with the API key set will be injected.

What works for me create the file config/cashier.php and set this inside

use Laravel\Cashier\Invoices\DompdfInvoiceRenderer;

return [

	/*
	|--------------------------------------------------------------------------
	| Stripe Keys
	|--------------------------------------------------------------------------
	|
	| The Stripe publishable key and secret key give you access to Stripe's
	| API. The "publishable" key is typically used when interacting with
	| Stripe.js while the "secret" key accesses private API endpoints.
	|
	*/

	'key' => env('STRIPE_MODE') == 'live' ? env('STRIPE_LIVE_KEY') : env('STRIPE_TEST_KEY'),

	'secret' => env('STRIPE_MODE') == 'live' ? env('STRIPE_LIVE_SECRET') :  env('STRIPE_TEST_SECRET'),

	/*
	|--------------------------------------------------------------------------
	| Cashier Path
	|--------------------------------------------------------------------------
	|
	| This is the base URI path where Cashier's views, such as the payment
	| verification screen, will be available from. You're free to tweak
	| this path according to your preferences and application design.
	|
	*/

	'path' => env('CASHIER_PATH', 'stripe'),

	/*
	|--------------------------------------------------------------------------
	| Stripe Webhooks
	|--------------------------------------------------------------------------
	|
	| Your Stripe webhook secret is used to prevent unauthorized requests to
	| your Stripe webhook handling controllers. The tolerance setting will
	| check the drift between the current time and the signed request's.
	|
	*/

	'webhook' => [
		'secret' => env('STRIPE_WEBHOOK_SECRET'),
		'tolerance' => env('STRIPE_WEBHOOK_TOLERANCE', 300),
	],

	/*
	|--------------------------------------------------------------------------
	| Currency
	|--------------------------------------------------------------------------
	|
	| This is the default currency that will be used when generating charges
	| from your application. Of course, you are welcome to use any of the
	| various world currencies that are currently supported via Stripe.
	|
	*/

	'currency' => env('CASHIER_CURRENCY', 'usd'),

	/*
	|--------------------------------------------------------------------------
	| Currency Locale
	|--------------------------------------------------------------------------
	|
	| This is the default locale in which your money values are formatted in
	| for display. To utilize other locales besides the default en locale
	| verify you have the "intl" PHP extension installed on the system.
	|
	*/

	'currency_locale' => env('CASHIER_CURRENCY_LOCALE', 'en'),

	/*
	|--------------------------------------------------------------------------
	| Payment Confirmation Notification
	|--------------------------------------------------------------------------
	|
	| If this setting is enabled, Cashier will automatically notify customers
	| whose payments require additional verification. You should listen to
	| Stripe's webhooks in order for this feature to function correctly.
	|
	*/

	'payment_notification' => env('CASHIER_PAYMENT_NOTIFICATION'),

	/*
	|--------------------------------------------------------------------------
	| Invoice Settings
	|--------------------------------------------------------------------------
	|
	| The following options determine how Cashier invoices are converted from
	| HTML into PDFs. You're free to change the options based on the needs
	| of your application or your preferences regarding invoice styling.
	|
	*/

	'invoices' => [
		'renderer' => env('CASHIER_INVOICE_RENDERER', DompdfInvoiceRenderer::class),

		'options' => [
			// Supported: 'letter', 'legal', 'A4'
			'paper' => env('CASHIER_PAPER', 'letter'),
		],
	],

	/*
	|--------------------------------------------------------------------------
	| Stripe Logger
	|--------------------------------------------------------------------------
	|
	| This setting defines which logging channel will be used by the Stripe
	| library to write log messages. You are free to specify any of your
	| logging channels listed inside the "logging" configuration file.
	|
	*/

	'logger' => env('CASHIER_LOGGER'),

];