Failed to match stub account created by Neon Webhook

[ERosendo]

After reviewing an issue with an account, we found a potential bug in the signup process related to stub accounts. Our records show that the events leading to the bug happened in the following order:

• A Neon webhook triggered the creation of a stub account.
• A user attempted to sign up with the same email address used for the stub account.
• The signup process didnt detect the existing stub account and created a new complete account.

Expected behavior:

The signup process should identify the existing stub account (created by the Neon webhook) and merge it with the new signup attempt, resulting in a single complete account.

Actual behavior:

The signup process creates a new complete account with the same email as the existing stub account, leading to duplicate accounts and potentially incomplete user information.