Error getting OData from Microsoft Graph: Access to the resource is forbidden

Thanks a lot for sharing, Anonymous!

Code seems to be ok, but I am getting an error: Formula.Firewall: Query 'Devices (Azure AD)' (step 'Source') references other queries or steps, so it may not directly access a data source. Please rebuild this data combination.

Anyone has a clue why this is happening? 
AzureAccessToken query is returing token successfully, but I can't use it in OData.Feed method.

Parameters:

Azure Graph API Url = https://graph.microsoft.com/v1.0/

Azure Tenant Id = ...
Azure Application Id = ...

Azure Application Client Secret = ...

Query: AzureAccessToken

let
    TokenUri = "https://login.windows.net/" & #"Azure Tenant Id" & "/oauth2/token",
    ResourceId = "https://graph.microsoft.com",
    TokenResponse = Json.Document(Web.Contents(TokenUri, 
	[
	Content = Text.ToBinary(Uri.BuildQueryString([client_id = #"Azure Application Id", resource = ResourceId, grant_type = "client_credentials", client_secret = #"Azure Application Client Secret"])), 
	Headers = [Accept = "application/json"], ManualStatusHandling = {400}
        ]
    )),
    AzureAccessToken = TokenResponse[access_token]
in
    AzureAccessToken

 
Query: Devices (Azure AD)

let
    Source = OData.Feed(#"Azure Graph API Url" & "devices", [Authorization = "Bearer " & AzureAccessToken])
in
    Source