Get cardholder details
Partner API key (sk_live_* for production, sk_test_* for sandbox)
Cardholder ID
"ch_abc123"
Cardholder details
Contro cardholder ID
"ch_abc123"
Your unique identifier for this user
"user_42"
Cardholder's first name
"Jane"
Cardholder's last name
"Doe"
Email address
"jane@example.com"
E.164 formatted phone number, or null if not provided
"+14155552671"
KYC verification status. One of: pending, approved, rejected
"approved"
Cardholder account status. One of: active, suspended, closed
"active"
ISO 8601 creation timestamp
"2026-03-20T14:30:00Z"
Custom key-value metadata, or null if not set
{ "plan": "premium" }