Add custom_attributes field to OrganizationMembership

[ajworkos]

Summary

Adds custom_attributes field to OrganizationMembership model to expose custom attributes from identity providers.

Changes

• Added custom_attributes field to OrganizationMembership type/model
• Field type: Record/Map/Dictionary of string keys to any values
• Always present, defaults to empty object {}
• Updated fixtures and tests

API Field Details

The field will be present in:

• REST API responses
• Webhook events
• Events API responses

JSON field name: custom_attributes (snake_case)

[greptile-apps]

Greptile Overview

Greptile Summary

Adds an idp_attributes field to WorkOS.UserManagement.OrganizationMembership (type + struct) and populates it during cast/1, defaulting to an empty map when absent.

Main concern: the PR description indicates the source is organizationMembership.customAttributes, but the code currently reads "idp_attributes" from the decoded map; if the API payload key differs (e.g., custom_attributes), the value will be dropped and always default to %{}.

Confidence Score: 3/5

• This PR is likely safe to merge, but there is a realistic risk the new field won’t populate due to an API key mismatch.
• Change is small and localized (type/struct + cast). The main risk is correctness: if the API provides customAttributes/custom_attributes as described, reading idp_attributes will silently default to %{} and lose data, which is hard to detect via types/tests unless fixtures cover it.
• lib/workos/user_management/organization_membership.ex

Important Files Changed

Filename	Overview
lib/workos/user_management/organization_membership.ex	Adds idp_attributes field to OrganizationMembership type/struct and casts it from the API map with a default empty map.

Sequence Diagram

sequenceDiagram
  participant API as WorkOS API
  participant UM as WorkOS.UserManagement.OrganizationMembership
  participant Caller as SDK consumer

  API-->>UM: JSON map (decoded)
  UM->>UM: cast(map)
  UM->>UM: idp_attributes = map["idp_attributes"] || %{}
  UM-->>Caller: %OrganizationMembership{... idp_attributes: ...}

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[greptile-apps]

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