optimize tenant with saldo query, fix

api/additional_methods.py

@@ -36,10 +36,10 @@ def get_account_saldo(user, token_info, accountId=None):
 def get_tenant_with_saldo(user, token_info):
     return dbGetMany(user, token_info, {
             "statement": """
-                             SELECT t.firstname, t.lastname, t.address1, sum(a.amount) AS saldo 
+                             SELECT t.id, t.firstname, t.lastname, t.address1, sum(a.amount) AS saldo 
                                FROM tenant_t t, account_entry_t a 
                                WHERE a.account = t.account 
-                               GROUP BY t.firstname, t.lastname, t.address1
+                               GROUP BY t.id, t.firstname, t.lastname, t.address1
                          """, 
             "params": ()
         }