VBA Login code (userform)

This is the codes i'm using for the user form i've created:

Option Explicit

Private Sub Login_Click()

Dim user As Variant
user = LoginPage.UserName.Value

Dim pw As Variant
pw = LoginPage.UserName.Value

Dim try As Integer
try = 0


Dim formula As String
formula = "C" & WorksheetFunction.Match(user, Sheet2.Range(Cells(9, 2), Cells(18, 2)), 0)

Dim successlogin As String
successlogin = "Welcome back " & user & "! Your login will be recorded down."

If try < 4 Then

    If WorksheetFunction.CountIf(WorksheetFunction.Indirect(Sheet2.Range(Cells(9, 2), Cells(18, 2))), pw) = 1 Then
    
    MsgBox (successlogin)
    
    Unload Me
    
    Else
    
    MsgBox ("Either your username or password is incorrect, please try again.")
    try = try + 1
    
    End If
    
Else

    MsgBox ("You have failed to enter the correct login key within 3 attempts. The file will now be closed.")
    Unload Me
    
End If

End Sub

What i'm trying to do can be separated into different phase:

Phase 1: Code the userform so that the UserName and password inputted can be matched with those in data pool and if it's matched, Login successful, or else, failed.

Phase 2: Code to record down all the successful login into Sheet 2.

Phase 3: Disable the [exit "x"] button of the login userform.


PLEASE~~!!! ANYONE?! PLEASE HELP ME!!