Login/signup form which allows user to create new account or signin if he has a valid account

login/signup form

Each system must be user based to be secured and to make sure that you don't get hacked so you need to insert login/signup form to the system.
I have created a login/signup form that is doing the following:

1. the login/signup form allows the user to create new user account.
   
2. the login/signup form allows the user to login using a created account.
   
3. the login/signup form is session based.