refactor: refactor MongoDB client connection

- Replace `mongo.NewClient` with `mongo.Connect` to create a new client
- Remove the code block that connects the client

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

Author: appleboy

mongo/mongodriver/mongodriver_test.go

@@ -16,15 +16,11 @@ const mongoTestServer = "mongodb://localhost:27017"
 var newStore = func(_ *testing.T) sessions.Store {
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel()
-	client, err := mongo.NewClient(options.Client().ApplyURI(mongoTestServer))
+	client, err := mongo.Connect(ctx, options.Client().ApplyURI(mongoTestServer))
 	if err != nil {
 		panic(err)
 	}
 
-	if err := client.Connect(ctx); err != nil {
-		panic(err)
-	}
-
 	c := client.Database("test").Collection("sessions")
 	return NewStore(c, 3600, true, []byte("secret"))
 }