How to use Google Analytics Metrics Expression?

Here I have a custom event file_download that I want to get.
I first tried eventCount which is going to get all the event count in one. I want to filter only the file_download or any other custom event. How can we do that?
Thanks [IMG alt="?"]https://static.xx.fbcdn.net/images/emoji.php/v9/t1f/2/16/1f64f.png[/IMG]

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Hi @blueli,

Please try removing 'file_download' from the Metrics Expression to see if that resolves the issue and provides the correct result for you.

Yes it will work if I remove it.
But my question is how to use the Metrics Expression. is it possible be used to filter the event we need?
Thanks

Hey @blueli

But my question is how to use the Metrics Expression. is it possible be used to filter the event we need?

https://developers.google.com/analytics/devguides/reporting/data/v1/api-schema

After reviewing the screenshot you provided, it appears that the metrics you are seeking cannot be found in Google Analytics.