Bubble and GTP API

I want a responsive Bubble app with an API to custom GTP API with the following features:

A main admin account
Sub admin accounts for different businesses that the sub admin can create with a code
5 x teams leaders accounts within each business each with their own code
User accounts that can be creased by users, linked to a team leader by a code they use at login, as well as their own details they can set up with email confirmation

Functionality
Each Team leader can upload a document, or speech to describe a task to do
Each user can speak to the app to ask questions about the task, simplified for the user

On each user request, company documents already in a database should be consulted, as well as the document from the team leader, to the custom GPT behind the scenes, and then answers returned to users.

Team leaders will be able to upload a new document after each task is completed, with their code allowing users to only see the new task, not the old one, but for the data to be retained in the bubble database.