Create Dataset with datasource programatically

Hi lbendlin 

Thanks for the quick response.

But API doesn't allow me to modify the dataset which is created on Local instance.

{
  "error": {
    "code": "ItemNotFound",
    "message": "Dataset <dataset_id> is not Push API dataset."
  }
}

Also, it doesn't allow me to push a Datasource with a dataset. 

https://docs.microsoft.com/en-us/rest/api/power-bi/pushdatasets/datasets_postdataset

The above endpoint documentation says, it takes data source property in the request, but when I add one it throws below error

{
  "error": {
    "code": "BadRequest",
    "message": "Bad Request",
    "details": [
      {
        "message": "The property 'datasource' does not exist on type 'Microsoft.PowerBI.ServiceContracts.Api.Dataset'. Make sure to only use property names that are defined by the type.",
        "target": "dataset"
      }
    ]
  }
}

 Is there any way I can link the data source to the custom dataset?

Thanks

Seethend