Returns a single user by ID.
Bearer authentication using the project Secret Key (prefixed with sk_, or test_sk_ for sandbox). All v4 public endpoints require the Secret Key — see Authentication. Never expose the Secret Key in client-side code.
User identifier.
User details
user Unique user identifier.
"user_abc123"
Canonical API path.
"/v4/users/user_abc123"
Environment the user belongs to (e.g. "sandbox", "production").
"production"
Creation timestamp (ISO 8601 UTC).
"2025-09-15T12:30:00Z"
External identity identifier, if set. Null when not linked to an identity.