bugfix: check if user exists before create a new refresh token

[Cristhianzl]

This pull request introduces a new validation step before creating a new refresh token. Additionally, improvements have been made to the interceptor functionality.

Changes:

• User Existence Check:

Added a check to verify if the user exists in the database before generating a new refresh token. This ensures that tokens are only created for valid users.

• Interceptor Improvements:

Applied several enhancements to the interceptor to improve its performance and reliability.
#3130

[github-actions]

Pull Request Validation Report

This comment is automatically generated by Conventional PR

Whitelist Report

Whitelist	Active	Result
Pull request is a draft and should be ignored	✅	❌
Pull request is made by a whitelisted user and should be ignored	❌	❌
Pull request is submitted by a bot and should be ignored	✅	❌
Pull request is submitted by administrators and should be ignored	❌	❌

Result

Pull request does not satisfy any enabled whitelist criteria. Pull request will be validated.

Validation Report

Validation	Active	Result
All commits in this pull request has valid messages	❌	✅
Pull request does not introduce too many changes	❌	✅
Pull request has a valid title	✅	✅
Pull request has mentioned issues	❌	✅
Pull request has valid branch name	❌	✅
Pull request should have a non-empty body	✅	✅

Result

Pull request satisfies all enabled pull request rules.

_{Last Modified at 30 Jul 24 15:57 UTC}

[aws-amplify-sa-east-1]

This pull request is automatically being deployed by Amplify Hosting (learn more).

Access this pull request here: https://pr-3076.dmtpw4p5recq1.amplifyapp.com

[nicoloboschi]

LGTM