Query takes too much time to load in Power Pivot Data Model

It used to take 15 mins. Now it is around 4 mins 😀. I am writing the code below just in case someone  has another suggestion to bring down that 4 min. 

let
     // Step 1: Define the Software Key parameter
    softwareKey = "zzzzz",

    // Define the base URL
    baseUrl = "http://xxxxx/api/v1/",

    // Step 2: Define a function to obtain the token
    GetToken = () =>
    let
        response = Web.Contents(baseUrl, [
            RelativePath = "token/" & softwareKey
        ]),
        tokenResponse = Json.Document(response),
        token = tokenResponse[TokenGuid]
    in
        token,

    // Step 3: Obtain the token
    token = GetToken(),

    // Step 4: Define a function for API requests with token
    GetAPIData = (endpoint as text) =>
    let
        response = Web.Contents(baseUrl, [
            RelativePath = endpoint,
            Headers = [
                header = token,
                #"Content-Type"="application/json"
            ]
        ]),
        data = Json.Document(response)
    in
        data

in
    GetAPIData

Thanks again lbendlin