How do I write an sf object as a shapefile to a file geodatabase using st_write?

I don't quite understand the 'dsn', 'layer', and 'driver' arguments of st_write in relation to file geodatabases.

For example, I've tried both of these and no luck

st_write(sf.object, dsn = "filepath/FileGeoDatabase.gbd",layer="name of output layer", driver="OpenFileGDB")

st_write(sf.object, dsn = "filepath/FileGeoDatabase.gbd",layer="name of output layer", driver="ESRI Shapefile")