为什么AWS Lambda功能总是超时？

I am testing out aws lambda, using nodejs with the 4.3 version. I'm able to successfully complete all the statements in my handler function within the console test, which includes connecting to a mongodb host within our vpc. But, the function always times out. I've found several posts and resources that discuss using the callback, and setting properties on the context, and IAM role permissions, but no matter what I do, it always ends up timing out. Current code:I am testing out aws lambda, using nodejs with