Update index.md

[joeynmq]

Proposed changes

The customer encountered the 409 Conflict error when sending Identify events to Klaviyo.

Having reviewed our integration code here, we will first attempt to create a new profile in Klaviyo. If the first request returns with a 409 error code, we will then send a second request to update the existing profile with the given profile ID: 

const profile = await request(`${API_URL}/profiles/`, {
  method: 'POST',
  json: profileData
})

...

if (response?.status === 409) {
   const profile = await request(`${API_URL}/profiles/${id}`, {
      method: 'PATCH',
      json: profileData
   })

Merge timing

ASAP once approved

Related issues (optional)

https://segment.atlassian.net/browse/KCS-1535

[github-actions]

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