main.py

from fastapi import FastAPI, File, UploadFile
from pydantic import BaseModel

from fastapi import Form

from fastapi.responses import JSONResponse

@app.post("/file/upload")
async def upload_file(username: str, uploaded_file: UploadFile = File(...)):
    path_to_save_file = Path.home() / username / "saved_files"
    path_to_save_file.mkdir(parents=True, exist_ok=True)
    file_location = f"{path_to_save_file}/{uploaded_file.filename}"
    with open(file_location, "wb+") as file_object:
        file_object.write(uploaded_file.file.read())
    return {"INFO": f"File '{uploaded_file.filename}' saved to your profile."}