(/guides/add-onboarding-flow) Add code comment that explains user.reload()

[abeisleem]

[!IMPORTANT] 🔎 Previews:

• add-onboarding-flow.mdx

Explanation:

It not easy to notice that developers should call user.reload() on the frontend after updating the user's publicMetadata on the backend when following the guide Add custom onboarding to your authentication flow. Making that call is a necessary part of the logic and has security implication depending on the use-case.

Discord issue: https://discord.com/channels/856971667393609759/1253768303483162644

This PR:

• This PR adds a callout to making a user.reload() function call.
• Also calls it out in the provided code-block incase it's not read earlier on the page.

[abeisleem]

cc: @JacobMGEvans

[alexisintech]

Please remove the callout and update the comment :)

[abeisleem]

@alexisintech, thanks for you input :) All suggestions are implemented.

[alexisintech]

awesome change - thank you so much for pointing this out @abeisleem