I've saved some Oauth token information from other services into Zoho CRM variables. 

Usually, I have no problem accessing these when making functions, so long as my function is associated to a module. In this case, I simply edit the function, add a variable, and select any variable from the linked modules.

However, it seems like there's no way of doing this for a standalone function. When I try to add an argument, it only lets me enter a text string. It doesn't let me call upon the CRM variables.

I'm wondering what the way around this is. Do I actually have to hardcode my CRM variables into the standalone function?