Android Question [SOLVED] Microsoft oAuth2 Login

curl --location --request GET 'https://login.microsoftonline.com/{tenant}/oauth2/v2.0/authorize?client_id=11111111-1111-1111-1111-111111111111&response_type=code&redirect_uri=https%3A%2F%2Flocalhost%2Fmyapp%2F&response_mode=query&scope=offline_access%20User.Read%20Mail.Read&state=12345'

Sub Class_Globals
    Private Root As B4XView
    Private xui As XUI
    Private CLIENT_ID As String = "fadfasfas-5e92-323-83a6-adfadfafa" 'fake
    Private ClientSecret As String = "adfr223-c9432be-323-b972-aewe23r2" 'fake
    Private const REDIRECT_URI As String = "https://login.microsoftonline.com/common/oauth2/nativeclient"
    Private const AUTH_URL As String = "https://login.microsoftonline.com/my-tenant-id/oauth2/v2.0/authorize"
    Private const SCOPE As String = "offline_access%20User.Read%20Mail.Read"
    Private const STATE As String = "12345"
    Private btnLogin As Button
    Private WebView1 As WebView
End Sub

Public Sub Initialize
'    B4XPages.GetManager.LogEvents = True
End Sub

'This event will be called once, before the page becomes visible.
Private Sub B4XPage_Created (Root1 As B4XView)
    Root = Root1
    Root.LoadLayout("MainPage")
End Sub

'You can see the list of page related events in the B4XPagesManager object. The event name is B4XPage.




Sub btnLogin_Click
    Dim authUrl As String = AUTH_URL & "?client_id=" & CLIENT_ID & "&response_type=code" & "&redirect_uri=" & REDIRECT_URI & "&response_mode=query" & "&scope=" & SCOPE & "&state=" & STATE
    WebView1.LoadUrl(authUrl)
End Sub

Sub WebView1_PageFinished (Url As String)
    If Url.StartsWith(REDIRECT_URI) Then
        Dim code As String = Url.SubString2(Url.IndexOf("code=") + 5, Url.Length)
        Log("Authorization Code: " & code)
        'Here you can continue getting the access token
    End If
End Sub