How to properly configured Multi-tenant in laravel? - laravel-5

Question

I have created multi-tenant application, still now that working as expected.
Here is my sample code:
middleware :
public function handle($request, Closure $next)
{
$user = Auth::user();
if (! is_null($user)) {
Config::set('database.connections.tenant.host', $user->hostname);
Config::set('database.connections.tenant.database', $user->database);
Config::set('database.connections.tenant.username', $user->username);
Config::set('database.connections.tenant.password', $user->password);
}
return $next($request);
}
database.php :
'connections' => [
'main' => [
'driver' => env('DB_DRIVER', 'mysql'),
'host' => env('DB_HOST', 'localhost'),
'port' => env('DB_PORT', '3306'),
'database' => env('DB_DATABASE', 'forge'),
'username' => env('DB_USERNAME', 'root'),
'password' => env('DB_PASSWORD', '123'),
'unix_socket' => env('DB_SOCKET', ''),
'charset' => 'utf8mb4',
'collation' => 'utf8mb4_unicode_ci',
'prefix' => '',
'strict' => true,
'engine' => null,
],
'tenant' => [
'driver' => env('DB_DRIVER', 'mysql'),
'host' => '',
'port' => env('DB_PORT', '3306'),
'database' => '',
'username' => '',
'password' => '',
'unix_socket' => env('DB_SOCKET', ''),
'charset' => 'utf8mb4',
'collation' => 'utf8mb4_unicode_ci',
'prefix' => '',
'strict' => true,
'engine' => null,
],
],
My doubt is : Above code is is possible to collapse DB connection, When multiple user access same time ? (each user has different DB)
for example :user A has school database and user B has college database
user A is try to logging [loading the page] that situation user B is login.
user B has no problem but user A -- get student details from college database or student database?