code: def show_databases(self):
      resp = self.sql_via_http("show databases", RESPONSE_TYPE.TABLE)
      return [x[0] for x in resp["data"]]
  
imports: from pathlib import Path
  import json
  import requests
  import pandas
  import pytest
  from mindsdb.api.executor.data_types.response_type import RESPONSE_TYPE
  from .conftest import make_test_csv
  from .http_test_helpers import HTTPHelperMixin
label_desc: Use image node_id 3 for calling the TestHTTP obj's underlying member method code with example usage: obj.show_databases() and returns: unknown