Even though Everything in your code is set up correctly, MongoDB service not running will make you get this kind of error.
MongoError: connect ECONNREFUSED 127.0.0.1:27017
You can fix this in just 4 steps.
<ul>
<li>From Control Panel go to Administrative Tools.</li>
<li>Double click on services.</li>
<li>Search for MongoDB server and left click on it.</li>
<li>Click on start and you're good to go.</li>
</ul>

Even though Everything in your code is set up correctly, MongoDB service not running will make you get this kind of error.

*MongoError: connect ECONNREFUSED 127.0.0.1:27017*

You can fix this in just 4 steps.

-  From Control Panel go to Administrative Tools.
-  Double click on services.
-  Search for MongoDB server and left click on it.
-  Click on start and you're good to go.





Get MongoDB Server started Again.