When parsing a connection string don't default to AzureMFA if the auth method is not, SqlLogin or Integrated or AzureMFA then return null as the AuthenticationType

Author: Allan Cascante

src/Microsoft.SqlTools.ServiceLayer/Connection/ConnectionService.cs

@@ -1749,16 +1749,31 @@ await Task.Factory.StartNew(() => Task.Run(async () => {
         public ConnectionDetails ParseConnectionString(string connectionString)
         {
             SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder(connectionString);
+            bool isAzureMFA = builder.Authentication == SqlAuthenticationMethod.ActiveDirectoryInteractive; // Azure Multi-Factor Authentication
+            bool isSqlLogin = builder.Authentication == SqlAuthenticationMethod.SqlPassword;// SQL username/password
+            bool isIntegrated = builder.IntegratedSecurity; // Windows Integrated Security
+            string Authenticationtype = null;
+
+            if (isAzureMFA)
+            {
+                Authenticationtype = "AzureMFA";
+            }
+            else if(isSqlLogin)
+            {
+                Authenticationtype = "SqlLogin";
+            }
+            else if (isIntegrated)
+            {
+                Authenticationtype = "Integrated";
+            }
 
             // Set defaults as per MSSQL connection property defaults, not SqlClient's Connection string buider defaults
             ConnectionDetails details = new ConnectionDetails()
             {
                 ApplicationIntent = defaultBuilder.ApplicationIntent != builder.ApplicationIntent ? builder.ApplicationIntent.ToString() : null,
                 ApplicationName = defaultBuilder.ApplicationName != builder.ApplicationName ? builder.ApplicationName : ApplicationName,
                 AttachDbFilename = defaultBuilder.AttachDBFilename != builder.AttachDBFilename ? builder.AttachDBFilename.ToString() : null,
-                AuthenticationType = builder.IntegratedSecurity ? "Integrated" :
-                    ((builder.Authentication == SqlAuthenticationMethod.SqlPassword || builder.Authentication == SqlAuthenticationMethod.NotSpecified)
-                    ? "SqlLogin" : "AzureMFA"),
+                AuthenticationType = Authenticationtype,
                 ConnectRetryCount = defaultBuilder.ConnectRetryCount != builder.ConnectRetryCount ? builder.ConnectRetryCount : 1,
                 ConnectRetryInterval = defaultBuilder.ConnectRetryInterval != builder.ConnectRetryInterval ? builder.ConnectRetryInterval : 10,
                 ConnectTimeout = defaultBuilder.ConnectTimeout != builder.ConnectTimeout ? builder.ConnectTimeout : 30,