Add validation for empty phone numbers

Author: Joshua Zhou

src/features/Account/validationSchema.ts

@@ -22,6 +22,7 @@ const getValidationSchema = (isCreate: boolean) => {
       'validPhone',
       'Must be a valid phone number',
       (value) => {
+        if (!value) return false;
         const parsedValue = value?.replace(/\D/g, '');
         return (
           !parsedValue || (parsedValue.length > 10 && parsedValue.length < 14)