Issue with returning a table.

I had a type in my code so updated. Was just the line which had "Query=10"
Followed the gif and got this

Notepad copy of the error. 
I think its closer

where the end of the url reads rooms/summary?postid=11169 it should read
rooms/summary/11169

And i really appreciate you helping me to trouble shoot this. 

let
  Centreid = Centreids,
  ids = List.Generate(() => 100000, each _ > 0, each _ - 1),
  url = "https://auth.xxxxxxxxxxx.com/api/v1/auth",
  body = "{ ""user"": ""xxxxxx"",  ""password"": ""xxxxxx""}",
  tokenResponse = Json.Document(
    Web.Contents(
      url,
      [Headers = [#"Content-Type" = "application/json"], Content = Text.ToBinary(body)]
    )
  ),
  data1 = tokenResponse[data],
  token = "Bearer " & data1[token],
  source = (Centreid as text) =>
    Json.Document(
      Web.Contents(
        "https://office.xxxxxxxx.com/api/enterprise/booking/center/rooms/summary",
        [
          Query =[
          postid = Centreid],
          Headers = [
            #"x-api-key"    = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
            Authorization   = token,
            #"Content-Type" = "application/json"
          ]
        ]
      )
    )
in
  source