Better validation on text fields, change AlertBanner to Snackbar

software/src/data/models/accountModel.ts

@@ -6,6 +6,7 @@ export class AccountModel {
   id: number
   username: string = ""
   password: string = ""
+  email: string = ""
   firstName: string = ""
   lastName: string = ""
   addresses: Array<AddressModel> = [ new AddressModel() ]