code: def get_authenticate_kwargs(oauth_credentials=None, http_=None):
      
      if oauth_credentials:
          authenticate_kwargs = {
              "credentials": oauth_credentials
          }
      elif http_:
          authenticate_kwargs = {
              "http": http_
          }
      else:
          # neither http_ or credentials provided
          try:
              # try default credentials
              credentials, _ = google.auth.default()
              authenticate_kwargs = {
                  "credentials": credentials
              }
          except google.auth.exceptions.DefaultCredentialsError:
              # try http using httplib2
              authenticate_kwargs = {
                  "http": httplib2.Http()
              }
  
      return authenticate_kwargs
docs: Returns a dictionary with keyword arguments for use with discovery
  
      Prioritizes oauth_credentials or a http client provided by the user
      If none provided, falls back to default credentials provided by google's command line
      utilities. If that also fails, tries using httplib2.Http()
  
      Used by `gcs.GCSClient` and `bigquery.BigQueryClient` to initiate the API Client