How to get Author Attribute when it's set for TestFixture level instead of Test level?

I want to set an Author for testFixture and get it at runtime to be able to fetch it in my DB :

Here is the TestFixture class I set Nunit attribut Author for testFixture level :

[TestFixture(Author = nameof(AuthorName.Eva)),MachineCategory.Filter]
public class FilterTests : WidiaTestSetup
{  

        [Test, RetryOnFailureOrException]
        public void FilterCuttingDiameter()
        { ...}
} 

To get the test Author from test level I do :

Author = TestContext.CurrentContext.Test.Properties.Get("Author").ToString()

But It is not working from testFixture How can I do to get it from TestFixture level ?

Thnaks in advance