I just installed the latest version of Laravel and tried to run the following command from my Git Bash:
php artisan migrate:make create_users_table --table=users
You don't have artisan. There are two reasons:
To be able to run php artisan you must be in your project folder, so first move to that folder using the cd command, then you can execute the command.
php artisan
cd
You haven't created a Laravel project in that folder. You must create one with Composer.