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When a file first uploaded we set the status to uploading.
After that we send a message to a topic to finish uploading the file - to move it from the temporary storage to the permanent and backup storages.

In that process to we want to update the file status based on where it has been uploaded.

If finished uploading to backup - backup
If finished uploading to permanent- permanent
If both - finished uploading

After a user has uploaded a file enable him to download it from the storage.

The whole page needs re-design

In the sign up route, save the user to the DB and generate a JWT token and send it to the client.
In the login route, validate the user's password against the DB, if correct generate JWT token and send it to the client.

In the client, after receiving JWT token, save it to the local storage and to the context.
Decode the token and save it to the context when the app starts up.

Add the token to every request after the client has been authenticated.
In the back-end verify the JWT token before handling requests in protected routes.

When a user uploads a file save the user id in the files table to connect the specific upload id with the user

Refactor the code to upload files from the frontend to the temporary storage account using SAS (Shared Access Signature) token.
When a user wants to upload a file we generate a SAS token in the backend and authenticate to the blob-storage using it.
Then we just upload the file using the library's API.
Azure Blob Storage

Then when moving from the temporary storage to the main storage download the stream with offsets and count.
Code Example

Add a context to all methods.
Send the ctx.Context to every method