How can I update the value inside a custom function from another custom function?

Hello there,

I have two custom functions right now, one of them has a variable called 'token' inside of it, and then I have another function (custom function) that I want to use to update the 'token' variable I have in custom function 1, is this possible by using REST API functions?

To illustrate it better, I have custom function that looks like this:

Custom function 1()

token = "abc123";

return token;

then from custom function 2, I want to modify the value 'token' in custom function 1, using the API type of function (so I made custom function 1 to be REST, and I added arguments on it, so my final custom function looks like this:

customFunction1(token)

mytoken = "";

if(token != ""){

mytoken = token;

}

return mytoken;

Then, I have tried to do this code in custom function2:

customfunction2()

updatecustomFunction1 = invokeUrl

[

URL: "the URL to get to my function"

Method: POST