Bad request while trying casting string to GUID

** View model:

`StudentViewModel.cs`

```
public Guid Id {get;set}
```

** Request body 

```
{
  "id": "ff3f5130-726a-4036-bf30-bf1d804d6a55"
}

```

** Expected:

- Parameters can be serialized into view model.

** Actual:

- Bad request was thrown.
