add_participant
Add a new participant to a sweepstakes. Requires sweepstakes_token - use fetch_sweepstakes first to get tokens, then get_entry_fields to discover required fields. Both email AND phone are required — the Sweeppea API rejects an entry missing either one. Field names must use underscores instead of spaces (e.g., "First_Name" not "First Name"). RULES: Only ONE participant at a time. NEVER add participants in bulk, batch, or loops. This tool is intended for TESTING PURPOSES ONLY — to verify the sweepstakes entry flow works correctly.