Ubuntu – Login failed: 530 User cannot log in. FTPS Azure connection failing with web app

I created my first .Net api and I would like to upload it in a Azure web page using Github actions and FTPS. However, I keep getting error when trying connect to the ftps server.
This is what I type in the main.yml to test the connection:

lftp -u "${{ secrets.AZURE_FTP_USERNAME }},${{ secrets.AZURE_FTP_PASSWORD }}" -e "open ${{ secrets.AZURE_FTP_SERVER }}; ls; bye"

And this is the output error:

##[debug]Evaluating condition for step: 'Debug FTPS Connection'
##[debug]Evaluating: success()
##[debug]Evaluating success:
##[debug]=> true
##[debug]Result: true
##[debug]Starting: Debug FTPS Connection
##[debug]Loading inputs
##[debug]Evaluating: format('echo "Testing FTPS connection..."
##[debug]lftp -u "{0},{1}" -e "open {2}; ls; bye"
##[debug]', secrets.AZURE_FTP_USERNAME, secrets.AZURE_FTP_PASSWORD, secrets.AZURE_FTP_SERVER)
##[debug]Evaluating format:
##[debug]..Evaluating String:
##[debug]..=> 'echo "Testing FTPS connection..."
##[debug]lftp -u "{0},{1}" -e "open {2}; ls; bye"
##[debug]'
##[debug]..Evaluating Index:
##[debug]....Evaluating secrets:
##[debug]....=> Object
##[debug]....Evaluating String:
##[debug]....=> 'AZURE_FTP_USERNAME'
##[debug]..=> '***'
##[debug]..Evaluating Index:
##[debug]....Evaluating secrets:
##[debug]....=> Object
##[debug]....Evaluating String:
##[debug]....=> 'AZURE_FTP_PASSWORD'
##[debug]..=> '***'
##[debug]..Evaluating Index:
##[debug]....Evaluating secrets:
##[debug]....=> Object
##[debug]....Evaluating String:
##[debug]....=> 'AZURE_FTP_SERVER'
##[debug]..=> '***'
##[debug]=> 'echo "Testing FTPS connection..."
##[debug]lftp -u "***,***" -e "open ***; ls; bye"
##[debug]'
##[debug]Result: 'echo "Testing FTPS connection..."
##[debug]lftp -u "***,***" -e "open ***; ls; bye"
##[debug]'
##[debug]Loading env
Run echo "Testing FTPS connection..."
##[debug]/usr/bin/bash -e /home/runner/work/_temp/7666aa93-ac5e-40b9-b1e6-a27a4c5a269e.sh
Testing FTPS connection...
ls: Login failed: 530 User cannot log in.

I quadruple checked and the FTPS endpoint, username, and password are the same and follow what I understood was the correct template:
AZURE_FTP_USERNAME=<app_name>$<app_name> (I tried adding more backslashes)
AZURE_FTP_PASSWORD=<password>
AZURE_FTP_SERVER=ftps://<something>.ftp.azurewebsites.windows.net(There is also /site/wwwroot after but I read that I shouldn’t include it there)

I have tried in the main.yml, I tried using curl, I also tried locally and using azure cli to get the server and other there. But the result stay the same login error.
Also the full main.yml

name: Build and deploy ASP.Net Core app to Azure Web App - noeflix

on:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

      - name: Set up .NET Core
        uses: actions/setup-dotnet@v4
        with:
          dotnet-version: '8.x'

      - name: Build with dotnet
        run: dotnet build --configuration Release

      - name: dotnet publish
        run: dotnet publish -c Release -o ${{ github.workspace }}/backend

      - name: Upload artifact for deployment job
        uses: actions/upload-artifact@v4
        with:
          name: .net-app
          path: ${{ github.workspace }}/backend

  deploy:
    runs-on: ubuntu-latest
    needs: build

    steps:
      - name: Download artifact from build job
        uses: actions/download-artifact@v4
        with:
          name: .net-app

      - name: Set up environment variables
        run: echo "TMDB_API_KEY=${{ secrets.TMDB_API_KEY }}" >> $GITHUB_ENV
          
      - name: Install lftp
        run: sudo apt-get install -y lftp

      - name: Debug FTPS Connection
        run: |
          echo "Testing FTPS connection..."
          lftp -u "${{ secrets.AZURE_FTP_USERNAME }},${{ secrets.AZURE_FTP_PASSWORD }}" -e "open ${{ secrets.AZURE_FTP_SERVER }}; ls; bye"

      - name: Deploy to Azure Web App via FTPS
        run: |
          lftp -u "${{ secrets.AZURE_FTP_USERNAME }},${{ secrets.AZURE_FTP_PASSWORD }}" -e "mirror --reverse --delete --verbose ./ ${AZURE_FTP_SERVER}/site/wwwroot; bye"