SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: alter table `admins` add unique `admins_username_unique`(`username`)) code example

Example: ERROR 1071 (42000) at line 76: Specified key was too long; max key length is 767 bytes laravel

use Illuminate\Support\Facades\Schema;

public function boot()
{
    Schema::defaultStringLength(191);
}