Restoring database file from backup file vb.net

Disable the emails in tblUsers by changing @ to #
  update tblUsers
set Email = replace(Email, '%@%', '%#%')
where Email like '%@%'

update tblusers 
set email = replace(email,'@','#')

Connection error:
USE MASTER
GO 
SELECT name as SQLServerLogIn,SID as SQLServerSID FROM sys.syslogins
WHERE [name] = 'user'
GO
                              
USE sdip
GO 
SELECT name DataBaseID,SID as DatabaseSID FROM sysusers
WHERE [name] = 'user'
GO

EXEC sp_users_login 'Auto_Fix', 'user'
GO

// https://www.mssqltips.com/sqlservertip/1590/understanding-and-dealing-with-orphaned-users-in-a-sql-server-database/