Globally unique UUID that identifies a specific Organization. The `organization_id` is critical to perform operations on an Organization, so be sure to preserve this value. You may also use the organization_slug or organization_external_id here as a convenience.

Globally unique UUID that identifies a specific Member. The `member_id` is critical to perform operations on a Member, so be sure to preserve this value. You may use an external_id here if one is set for the member.

The code to authenticate.

The Intermediate Session Token. This token does not necessarily belong to a specific instance of a Member, but represents a bag of factors that may be converted to a member session. The token can be used with the [OTP SMS Authenticate endpoint](https://stytch.com/docs/b2b/api/authenticate-otp-sms), [TOTP Authenticate endpoint](https://stytch.com/docs/b2b/api/authenticate-totp), or [Recovery Codes Recover endpoint](https://stytch.com/docs/b2b/api/recovery-codes-recover) to complete an MFA flow and log in to the Organization. The token has a default expiry of 10 minutes. It can also be used with the [Exchange Intermediate Session endpoint](https://stytch.com/docs/b2b/api/exchange-intermediate-session) to join a specific Organization that allows the factors represented by the intermediate session token; or the [Create Organization via Discovery endpoint](https://stytch.com/docs/b2b/api/create-organization-via-discovery) to create a new Organization and Member. Intermediate Session Tokens have a default expiry of 10 minutes.

A secret token for a given Stytch Session.

The JSON Web Token (JWT) for a given Stytch Session.

Set the session lifetime to be this many minutes from now. This will start a new session if one doesn't already exist, returning both an opaque `session_token` and `session_jwt` for this session. Remember that the `session_jwt` will have a fixed lifetime of five minutes regardless of the underlying session duration, and will need to be refreshed over time. This value must be a minimum of 5 and a maximum of 527040 minutes (366 days). If a `session_token` or `session_jwt` is provided then a successful authentication will continue to extend the session this many minutes. If the `session_duration_minutes` parameter is not specified, a Stytch session will be created with a 60 minute duration. If you don't want to use the Stytch session product, you can ignore the session fields in the response.

Add a custom claims map to the Session being authenticated. Claims are only created if a Session is initialized by providing a value in `session_duration_minutes`. Claims will be included on the Session object and in the JWT. To update a key in an existing Session, supply a new value. To delete a key, supply a null value. Custom claims made with reserved claims (`iss`, `sub`, `aud`, `exp`, `nbf`, `iat`, `jti`) will be ignored. Total custom claims size cannot exceed four kilobytes.

Optionally sets the Member’s MFA enrollment status upon a successful authentication. If the Organization’s MFA policy is `REQUIRED_FOR_ALL`, this field will be ignored. If this field is not passed in, the Member’s `mfa_enrolled` boolean will not be affected. The options are: `enroll` – sets the Member's `mfa_enrolled` boolean to `true`. The Member will be required to complete an MFA step upon subsequent logins to the Organization. `unenroll` – sets the Member's `mfa_enrolled` boolean to `false`. The Member will no longer be required to complete MFA steps when logging in to the Organization.

If the `telemetry_id` is passed, as part of this request, Stytch will call the [Fingerprint Lookup API](https://stytch.com/docs/fraud/api/fingerprint-lookup) and store the associated fingerprints and IPGEO information for the Member. Your workspace must be enabled for Device Fingerprinting to use this feature.