Setting db work_mem with tokio_postgres

let (mut client, connection) =
        tokio_postgres::connect("host=localhost user=user password=pass", NoTls).await?;

client.query("SET WORK_MEM=64", & [  ])
        .await?;

How to set work_mem to 64MB. That code above sets it to 64KB. I've tried number of different things, including adding MB to the second arg, but nothing seams to work.

Have you tried client.query("SET work_mem TO '64MB'").await?;? Taken from this blog post.