Added notifiation alert for overdraft

src/main/java/rocks/zipcode/atm/CashMachine.java

 
     public void exit() {
         if (accountData != null) {
+            // exiting account -> for this we want to clear display account summary of transactions and then clear all fields
             accountData = null;
         }
     }

src/main/java/rocks/zipcode/atm/bank/Bank.java

 
     public Bank() {
         accounts.put(1000, new BasicAccount(new AccountData(
-                1000, "Example 1", "example1@gmail.com", 500
+                1000, "Jared Walrus", "fisher@abe.com", 500
         )));
 
         accounts.put(2000, new PremiumAccount(new AccountData(
-                2000, "Example 2", "example2@gmail.com", 200
+                2000, "Biggie Younger", "southerKingdom@fisher.com", 200
         )));
 
         accounts.put(3000, new PremiumAccount(new AccountData(
-                2000, "Example 3", "example2@gmail.com", 100
+                3000, "Usurper TeeTay", "westernUnion@bank.com", 100
         )));
     }