Custom Connector Issue (mez file)

[zzinoun]

Hi ,

I am trying to use a custom connector to set up an automatoc refresh. However, I am stuck at this issue :

I guess this comes from a wrong parameter in the connector code but I could not determine the wrong part.

Here is the connector I am using (mez file).

section ProjectInsights;

[DataSource.Kind="ProjectInsights", Publish="ProjectInsights.Publish"]

shared ProjectInsights.Contents = (ProjectId as text) =>

let

    source = OData.Feed(

        Extension.LoadString("ProjectInsightsFeed") & ProjectId,

        null,

        [ ODataVersion = 4, MoreColumns = true ]

    )

in

    source;

openidConfiguration = Json.Document(Web.Contents(Extension.LoadString("WellKnown")));

ProjectInsights = [

    Authentication = [

        OAuth = [

            StartLogin = StartLogin,

            FinishLogin = FinishLogin,

            Label = "Bentley Account"

        ]

    ],

    Label = Extension.LoadString("DataSourceLabel")

];

client_id = Extension.LoadString("ClientId");

redirect_uri = "https://oauth.powerbi.com/views/oauthredirect.html";

windowWidth = 600;

windowHeight = 600;

code_challenge = Binary.ToText(Text.ToBinary(Text.NewGuid()), BinaryEncoding.Base64);

StartLogin = (resourceUrl, state, display) =>

let

    qs = Uri.BuildQueryString([

        client_id = client_id,

        state = state,

        response_type = "code",

        scope=Extension.LoadString("Scope"),

        code_challenge = code_challenge,

        redirect_uri = redirect_uri

    ]),

    AuthorizeUrl = openidConfiguration[authorization_endpoint] & "?" & qs

in

    [

        LoginUri = AuthorizeUrl,

        CallbackUri = redirect_uri,

        WindowHeight = windowHeight,

        WindowWidth = windowWidth,

        Context = null

    ];

FinishLogin = (context, callbackUri, state) =>

let

    parts = Uri.Parts(callbackUri)[Query],

    result = if (Record.HasFields(parts, {"error", "error_description"}))

        then

            error Error.Record(parts[error], parts[error_description], parts)

        else

            TokenMethod("authorization_code", parts[code])

in

    result;

TokenMethod = (grantType, code) =>

let

    query = [

        client_id = client_id,

        code = code,

        grant_type = "authorization_code",

        code_verifier = code_challenge,

        redirect_uri = redirect_uri

    ],

    queryWithCode = if (grantType = "refresh_token") then [ refresh_token = code ] else [code = code],

    Response = Web.Contents(

        openidConfiguration[token_endpoint],

        [

            Content = Text.ToBinary(Uri.BuildQueryString(query & queryWithCode)),

            Headers = [

                #"Content-type" = "application/x-www-form-urlencoded",

                #"Accept" = "application/json"

            ],

            ManualStatusHandling = { 400 }

        ]

    ),

    Parts = Json.Document(Response),

    Result =

        if (Record.HasFields(Parts, {"error", "error_description"}))

            then

                error Error.Record(Parts[error], Parts[error_description], Parts)

            else

                Parts

in

    Result;

Refresh = (resourceUrl, refresh_token) => TokenMethod("refresh_token", refresh_token);

Could you please advise  ?

Thank you,