Well I'm new to laravel, & still learning it. Basically when i use php artisan migrate, it migrates normally. This shows that my db is already connect with the app. I had before the same problem when I tried to migrate so changed my db's information on .env & .env.example then it worked ! I faced the problem when i connected the DB using a controller, when I tried to load it on the browser, got that error message

here is the controller

public function index()
	{
		$users = array();

		$users = DB::table('users')->get();

		return view('user.index', compact('users'));
	}

here is my DB

'connections' => [

		'sqlite' => [
			'driver'   => 'sqlite',
			'database' => storage_path().'/database.sqlite',
			'prefix'   => '',
		],

		'mysql' => [
			'driver'    => 'mysql',
			'host'      => env('DB_HOST', 'localhost'),
			'database'  => env('DB_DATABASE', 'laravel'),
			'username'  => env('DB_USERNAME', 'root'),
			'password'  => env('DB_PASSWORD', ''),
			'charset'   => 'utf8',
			'collation' => 'utf8_unicode_ci',
			'prefix'    => '',
			'strict'    => false,
		],

	],

The .env file

APP_ENV=local
APP_DEBUG=true
APP_KEY=c87CmMxkDXE3nlPTcr8AaZGFYsf5juH3

DB_HOST=localhost
DB_DATABASE=laravel
DB_USERNAME=root
DB_PASSWORD=

CACHE_DRIVER=file
SESSION_DRIVER=file

The .env.example file

APP_ENV=local
APP_DEBUG=true
APP_KEY=SomeRandomString

DB_HOST=localhost
DB_DATABASE=laravel
DB_USERNAME=root
DB_PASSWORD=

CACHE_DRIVER=file
SESSION_DRIVER=file

Thank u for any help :)