Add employee importer for CORE -> Rattail, and CORE cashier auth handler

rattail_corepos/app.py

@@ -92,6 +92,21 @@ class CoreHandler(GenericHandler):
     # TODO: deprecate / remove this
     get_office_customer_account_url = get_office_member_url
 
+    def get_office_employee_url(
+            self,
+            employee_number,
+            office_url=None,
+            require=False,
+            **kwargs):
+        """
+        Returns the CORE Office URL for the employee with the given
+        number.
+        """
+        if not office_url:
+            office_url = self.get_office_url(require=require)
+        if office_url:
+            return f'{office_url}/admin/Cashiers/CashierEditor.php?emp_no={employee_number}'
+
     def get_office_product_url(
             self,
             upc,