class_docstr: The GitLab handler implementation
docstr: Check connection to the handler
  Returns:
      HandlerStatusResponse
code: def check_connection(self) -> StatusResponse:
      """Check connection to the handler
      Returns:
          HandlerStatusResponse
      """
      response = StatusResponse(False)
  
      try:
          self.connect()
          if self.connection_data.get("api_key", None):
              logger.info(f"Authenticated as user")
          else:
              logger.info("Proceeding without an API key")
  
          response.success = True
      except Exception as e:
          logger.error(f"Error connecting to GitLab API: {e}!")
          response.error_message = e
  
      self.is_connected = response.success
  
      return response
  
file_path: mindsdb/mindsdb/integrations/handlers/gitlab_handler/gitlab_handler.py
imports: import gitlab
  from mindsdb.integrations.handlers.gitlab_handler.gitlab_tables import GitlabIssuesTable, GitlabMergeRequestsTable
  from mindsdb.integrations.libs.api_handler import APIHandler
  from mindsdb.integrations.libs.response import HandlerStatusResponse
  from mindsdb.utilities import log
  from mindsdb_sql import parse_sql
label_desc: Use image node_id 3 for calling the GitlabHandler obj's underlying member method code with example usage: obj.check_connection() and returns: response