Building the login/logout client

Our login function takes the following signature:

// nanoservices/user-session-cache/cache-client/src/lib.rs
pub async fn login(
        address: &str,
        user_id: &str,
        timeout_mins: usize,
        perm_user_id: i32
    ) -> Result<(), NanoServiceError> {
    . . .
    Ok(())
}

Inside our login function, we get the connection and send the request with the code below:

// nanoservices/user-session-cache/cache-client/src/lib.rs
let mut con = get_connnection(address).await?;
let result = con
    .req_packed_command(
        &redis::cmd("login.set")
            .arg(user_id)
            .arg(timeout_mins)
            .arg(perm_user_id.to_string())
            .clone(),
    )
    .await.map_err(|e|{
        NanoServiceError::new(
            e.to_string(),
            NanoServiceErrorStatus::Unknown
        )
    })?;
match result {
    Value::Okay => {
        return Ok(());
    },
    _ => {
        return...