curl -L -X POST "https://api.box.com/2.0/integration_mappings/slack" \
     -H "authorization: Bearer <ACCESS_TOKEN>" \
     -H 'content-type: application/json' \
     -d '{
          "partner_item": {
              "id": "C987654321",
              "type": "channel",
              "slack_workspace_id": "T5555555"
          },
          "box_item": {
              "id": "123456789",
              "type": "folder"
          }
      }'

user_client.integration_mappings.create_slack_integration_mapping(
    IntegrationMappingPartnerItemSlack(
        id=slack_partner_item_id, slack_org_id=slack_org_id
    ),
    IntegrationMappingBoxItemSlack(id=folder.id),
)

await userClient.integrationMappings.createSlackIntegrationMapping({
  partnerItem: new IntegrationMappingPartnerItemSlack({
    id: slackPartnerItemId,
    slackOrgId: slackOrgId,
  }),
  boxItem: new IntegrationMappingBoxItemSlack({ id: folder.id }),
} satisfies IntegrationMappingSlackCreateRequest);

try await userClient.integrationMappings.createSlackIntegrationMapping(requestBody: IntegrationMappingSlackCreateRequest(partnerItem: IntegrationMappingPartnerItemSlack(id: slackPartnerItemId, slackOrgId: slackOrgId), boxItem: IntegrationMappingBoxItemSlack(id: folder.id)))

userClient.getIntegrationMappings().createSlackIntegrationMapping(new IntegrationMappingSlackCreateRequest(new IntegrationMappingPartnerItemSlack.Builder(slackPartnerItemId).slackOrgId(slackOrgId).build(), new IntegrationMappingBoxItemSlack(folder.getId())))

await userClient.IntegrationMappings.CreateSlackIntegrationMappingAsync(requestBody: new IntegrationMappingSlackCreateRequest(partnerItem: new IntegrationMappingPartnerItemSlack(id: slackPartnerItemId) { SlackOrgId = slackOrgId }, boxItem: new IntegrationMappingBoxItemSlack(id: folder.Id)));

{
  "id": "12345",
  "type": "integration_mapping",
  "partner_item": {
    "id": "C12378991223",
    "type": "channel",
    "slack_org_id": "E1234567"
  },
  "box_item": {
    "id": "12345",
    "type": "folder",
    "etag": "1",
    "sequence_id": "3",
    "name": "Contracts"
  },
  "integration_type": "slack",
  "is_manually_created": true,
  "options": {
    "is_access_management_disabled": true
  },
  "created_by": {
    "id": "11446498",
    "type": "user",
    "name": "Aaron Levie",
    "login": "ceo@example.com"
  },
  "modified_by": {
    "id": "11446498",
    "type": "user",
    "name": "Aaron Levie",
    "login": "ceo@example.com"
  },
  "created_at": "2012-12-12T10:53:43-08:00",
  "modified_at": "2012-12-12T10:53:43-08:00"
}

{
  "type": "error",
  "status": 400,
  "code": "item_name_invalid",
  "message": "Method Not Allowed",
  "context_info": {
    "message": "Something went wrong"
  },
  "help_url": "https://developer.box.com/guides/api-calls/permissions-and-errors/common-errors/",
  "request_id": "abcdef123456"
}

{
  "type": "error",
  "status": 400,
  "code": "item_name_invalid",
  "message": "Method Not Allowed",
  "context_info": {
    "message": "Something went wrong"
  },
  "help_url": "https://developer.box.com/guides/api-calls/permissions-and-errors/common-errors/",
  "request_id": "abcdef123456"
}

{
  "type": "error",
  "status": 400,
  "code": "item_name_invalid",
  "message": "Method Not Allowed",
  "context_info": {
    "message": "Something went wrong"
  },
  "help_url": "https://developer.box.com/guides/api-calls/permissions-and-errors/common-errors/",
  "request_id": "abcdef123456"
}