How to add sqljdbc_auth.dll to gradle project

The sqljdbc_auth.dll is used by mssql-jdbc driver to do windows authentication. How can I add both dependencies to my gradle project?

I am able to add mssql-jdbc from a local folder, like this:

flatDir {
    dirs 'libs'
//JAR jdbc
implementation name:  'mssql-jdbc-7.4.1.jre8'
implementation name:  'mssql-jdbc-7.4.1.jre8-shaded'

but I can't find a way to add 'sqljdbc_auth.dll'

Other solution would be to add them from some maven repository but it doesn't seam to add the native dependency.