title: SmartSheet add row to bottom in python SDK
body: <p>Using the python library and the 2.0 API docs.  I am trying to add a row but keep getting the error: <code>"message": "Required object attribute(s) are missing from your request: row.id."</code></p>
  
  <p>The problem seems to be with the <code>new_row.to_bottom=True</code> statement.  Am I mis understanding or is there an error in the API?
  I also noticed that when I added <code>to_top</code> in the same call, the message came back with <code>only toTop or toBottom in a single call.</code> I tried again with that syntax and still no luck.</p>
  
  <pre><code>import smartsheet
  ...
  new_row = ss_client.models.Row()
  new_row.to_bottom = True       #also tried .toBottom=True
  new_cell = ss_client.models.Cell()
  new_cell.column_id = 9380123454964
  new_cell.value = 'update'
  new_cell.strict = False
  new_row.cells.append(new_cell)
  updated_row = ss_client.Sheets.update_rows(1234567,[new_row]) #also tried new_row outside of []
  
  
  Response: {
  status: 400 Bad Request
  content: {
  {
      "detail": {
          "index": 0
      },
      "errorCode": 1012,
      "message": "Required object attribute(s) are missing from your request: row.id.",
      "refId": "152g54q6e89sd"
  }
  }
  </code></pre>
  
  <p>Anyone know how to fix this?  is the SDK still on 1.0 or something?</p>