Refresh token in background

Specific Domains Web Stack
1

I access a REST API that rely on a temporary token. The token is short lived, but does come with a refresh token. I store it in a struct like

mutable struct MyToken
    AccessToken::String
    RefreshToken::String
    ExpiresIn::UInt64
end

I have a method refresh!(token) that updates AccessToken using RefreshToken.

I would like to keep the token valid throughout the lifetime of my Julia session. Something like this works

function auto_refresh!(token)
    @async begin
        sleep(token.ExpiresIn)
        @info "Updating token"
        refresh!(token)
        auto_refresh!(token)
    end
end

But I wonder if this is a good approach?