Power BI Dayforce API Connection Fails with "We Couldn't Authenticate with the Credentials Provided"

I created a blank query in Power BI and am trying to retrieve data from the Dayforce API using the following M code:

let
    BaseUrl = "https://can261-services.dayforcehcm.com/api/{CompanyID}/V1",
    TokenUrl = "https://dfid.dayforcehcm.com/connect/token",

    TokenResponse =
        Json.Document(
            Web.Contents(
                TokenUrl,
                [
                    Headers = [
                        #"Content-Type" = "application/x-www-form-urlencoded"
                    ],
                    Content = Text.ToBinary(
                        Uri.BuildQueryString([
                            grant_type = "password",
                            companyId = CompanyID,
                            username = username,
                            password = password,
                            client_id = "Dayforce.HCMAnywhere.Client"
                        ])
                    )
                ]
            )
        ),

    AccessToken = TokenResponse[access_token],

    ReportResponse =
        Json.Document(
            Web.Contents(
                BaseUrl & "/Reports/{ReportXRefCode}",
                [
                    Headers = [
                        Authorization = "Bearer " & AccessToken
                    ]
                ]
            )
        ),

    DataList = ReportResponse[Data]{0}[Rows],
    ToTable = Table.FromRecords(DataList)

in
    ToTable

The issue I'm encountering is that Power BI prompts me to edit credentials for the following URL:

https://can261-services.dayforcehcm.com/

Since the bearer token is being generated within the query, the authentication method I should select in the credential dialog is Anonymous. However, when I do that, I receive the following error:

"We couldn't authenticate with the credentials provided. Please try again."

My questions are:

1. How can I fix this authentication error and why am I getting this?
2. I get all the information when I run a similar query in Python in my VSCode, so I know that the steps are correct. I just need help in making it work in Power Query in Power BI.

3. Has anyone successfully connected to the Dayforce API from Power BI using this approach?

Any guidance or working examples would be greatly appreciated.