from cognite.client.data_classes.data_modeling import ViewId
from cognite.client.data_classes.postgres_gateway import ViewTableWrite
table = ViewTableWrite(tablename="myCustom", options=ViewId(space="mySpace", external_id="myExternalId", version="v1"))
res = client.postgres_gateway.tables.create("myUserName",table)

{
  "items": [
    {
      "columns": {},
      "createdTime": 1730204346000,
      "tablename": "<string>",
      "options": {
        "space": "<string>",
        "externalId": "<string>",
        "version": "<string>"
      }
    }
  ]
}