Unauthorized to get list of terminals - adyen

Question

I'm getting a 401 Unauthorized error when trying to use the management API to get a list of terminals. I'm using PowerShell Invoke-RestMethod.
Here's what I'm trying to run:
$Key = [API Key]
$Headers = #{'Content-Type' = 'application/json'; 'X-API-Key' = $Key}
$Uri = "https://management-test.adyen.com/v1/terminals"
Invoke-RestMethod -Method GET -Uri $Uri -Headers $Headers
Result is this:
Invoke-RestMethod : The remote server returned an error: (401) Unauthorized.
At line:1 char:1
+ Invoke-RestMethod -Method GET -Uri $Uri -Headers $Headers
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-RestMethod], WebException
+ FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand
The API library states that the API Credential must have the 'POS Terminal Management API' and 'Management API—Terminal settings read' roles assigned, which it does.
I do get a success code when I try the API to get company account, so I know the API key works. Is there something else I'm missing?

Answer 1

I was able to access /v1/terminals after granting also the PSP Terminal Action Management API role.
Assign to the API credential that owns the API Key the following roles:
POS Terminal Management API
Management API—Terminal settings read
PSP Terminal Action Management API