code: def insert_dashboard_created_by(self, username: str) -> Dashboard:
      user = self.get_user(username)
      dashboard = self.insert_dashboard(
          f"create_title_test",
          f"create_slug_test",
          [user.id],
          created_by=user,
      )
      return dashboard
  
file_path: superset/tests/integration_tests/profile_tests.py
imports: import prison
  import pytest
  from superset import db
  from superset.connectors.sqla.models import SqlaTable
  from superset.models.dashboard import Dashboard
  from superset.models.slice import Slice
  from tests.integration_tests.fixtures.birth_names_dashboard import load_birth_names_dashboard_with_slices, load_birth_names_data
  from tests.integration_tests.fixtures.public_role import public_role_like_gamma
  from tests.integration_tests.insert_chart_mixin import InsertChartMixin
  from .base_tests import SupersetTestCase
label_desc: Use image node_id 1 for calling the TestProfile obj's underlying member method code with example usage: obj.insert_dashboard_created_by(username) and returns: dashboard