Handling a Paginated API with Prebuilt Next Page URI in Response [EDITED]

Solved it using a custom recursive function which grabs the offset, builds the next page's uri, appends the data to a rolling total of the data, then makes another call with the new uri, provided a next page exists to be called upon. 

(baseuri as text) =>
let
    headers = [Headers=[#"Content-Type"="application/json", Authorization="Bearer APIKEY"]],

    initReq = Json.Document(Web.Contents(baseuri, headers)),
    initData = initReq[data],
    //We want to get data = {lastNPagesData, thisPageData}, where each list has the limit # of Records, 
    //then we can List.Combine() the two lists on each iteration to aggregate all the records. We can then
    //create a table from those records
    gather = (data as list, uri) =>
        let
            //get new offset from active uri
            newOffset = Json.Document(Web.Contents(uri, headers))[next_page][offset],
            //build new uri using the original uri so we dont append offsests
            newUri = baseuri & "&offset=" & newOffset,
            //get new req & data
            newReq = Json.Document(Web.Contents(newUri, headers)),
            newdata = newReq[data],
            //add that data to rolling aggregate
            data = List.Combine({data, newdata}),
            //if theres no next page of data, return. if there is, call @gather again to get more data
            check = if newReq[next_page] = null then data else @gather(data, newUri)
        in check,
    //before we call gather(), we want see if its even necesarry. First request returns only one page? Return.
    outputList = if initReq[next_page] = null then initData else gather(initData, baseuri),
    //then place records into a table. This will expand all columns available in the record.
    expand = Table.FromRecords(outputList)
in
    expand

This returns a fully expanded table of records from from all pages of data.

Extensions of functionality or efficieny modifications are more than welcome!