My version of Rich domain model dojo kata from ivanpaulovich

• A Customer could register a new Checking Account using its personal details.
• Allow a customer to deposit funds into an existing account.
• Allow the customer to withdraw funds from an existing account.
• Allow the customer to close a Checking Account only if the balance is zero.
• Do not allow the Customer to Withdraw more than the existing funds.
• Allow to get the account details.
• Allow to get the customer details.