Retrieve assets used in ads, linked via campaigns.
Args: customer_id: The Google Ads customer ID login_customer_id: Optional manager account ID asset_type: Optional filter by asset type (TEXT, IMAGE, etc.) campaign_id: Optional filter by campaign ID performance_label: Optional filter by performance (BEST, GOOD, LOW, PENDING, UNSPECIFIED, UNKNOWN, LEARNING) limit: Maximum number of assets to return oauth2_token: OAuth2 token for authentication
Returns: List of assets with performance data (from campaign context)
The access token received from the authorization server in the OAuth 2.0 flow.