In R blogdown webpage, Can we create a reference link so that I only need to change the links in R file. For Example I will create Link1 and Link2 as shown below. So now can we render this Link1 and Link2 in R blogdown .md files, so once I change the links in the below document, the webpage should be rendered. Let say, In Config.toml file (of hugo-universal-theme) there is literally a facebook link. But I do not require this. I should only use this Link1 to render facebook page. Is it possible to achieve this?