Account changes

src/main/java/com/nisum/myteam/model/Account.java

@@ -32,7 +32,7 @@ public class Account implements Serializable {
     @Id
     private ObjectId id;
    
-    @NotNull
+
     private String accountId;
     @NotNull
     @Size(min=2,max=50,message="Name should have atlast 2 and less than 50 characters")