React Web Implementation

Hallo

i have this Open source web application:
https://codesandbox.io/p/sandbox/property-finder-braze-example-qzcmdy?file=%2Fsrc%2Fcomponents%2FBrazeLogin.tsx
which i have to fix some of it to make it works on my local (i will share the package of my application which is working on my local )

i need developer who can change it is design to login page and when user login or submit login the same functionality works additionaly

1- make post call to this api:
https://rest.iad-01.braze.com/alias/new
for creating new user see API doc:
https://www.postman.com/braze-inc/braze-public-workspace/request/3nz2jbv/create-new-user-aliases?tab=overview

2- redirect to landing page (you can use any free pre built one i dont have specific design for it)
important is 2-3 products only as example when user click on add to cart it will call this fucntion:
braze.showInAppMessage(inAppMessage); ( inAppMessage should be html text only saying the product has been added )
location of the message should be middle of the page .

Guide me on replacing api key to connect my braze dashboard and see data to reflect and send out of the box default in app message.

if you have experience with Braze integration please ping me

Deadline 2-3 days , budget 100 Euro