loadUsers function
Implementation
Future<String?> loadUsers() async{
try{
listUsers = await dbGetAllDocumentInTable("listusers");
if (listUsers.length != appSettings.customersCount)
dbSetDocumentInTable("settings", "main", {"customersCount": listUsers.length});
}catch(ex){
return "loadUsers " + ex.toString();
}
return null;
}