$ agent-cards-admin cardholders create? API key: sk_test_a1b2c3d4e5f6...? First name: Alice? Last name: Smith? Date of birth (YYYY-MM-DD): 1990-01-15? Email (optional): alice@example.com? Phone number (optional):✓ Cardholder created ID ch_abc123 Name Alice Smith Email alice@example.com DOB 1990-01-15T00:00:00.000Z Stripe ID ich_1abc123 Created 3/10/2026, 12:00:00 PM