POST /api/data/v2/datasources HTTP/1.1
Host: {instance}.domo.com
X-DOMO-Developer-Token: {token}
Content-Type: application/json

{
  "userDefinedType": "api",
  "dataSourceName": "hello world",
  "schema": {
    "columns": [
      {
        "type": "STRING",
        "name": "Friend"
      },
      {
        "type": "STRING",
        "name": "Attending"
      }
    ]
  }
}