Passing Cookie in Header fails when querying GraphQL backend with GraphQL variables

Thanks Gao,

I managed to solve my problem and it had nothing to do with the authentication. Using a cookie like the example below works just fine.
The actual problem was the graphql part which had incorrect formatting. I was mislead by the error message.

If anyone wants to send a graphql request from power bi with actual variables, this is how it worked for me:

let
	url = "https://my-website.com/graphql",
	token = "express:sess=ey... [replace this value with you Cookie ]",
	body = "{ ""query"": ""query allParameter($filter: [FilterInput]) { allParameter(filter: $filter) { parameterId } }"", ""variables"": {""filter"": []} }",
    response = Web.Contents(
	url,
	[
		Headers=[
			#"Method"="POST",
			#"Content-Type" = "application/json",
			#"Cookie"=token
		],
		Content=Text.ToBinary(body)
	]
    ),

    jsonResponse = Json.Document(response)
   
in
    jsonResponse