Call SharePoint Rest API from Azure Data Factory Pipeline Web - azure

Question

I am trying to use Azure Data Factory to call the SharePoint Rest API to access sharepoint list data. I need to use the rest api because the SharePoint list has some complex data types (multi-select lookups).
In my pipleline I have 2 Web activities, one (called GetAToken) to get an access token and one (called GetListData) to get the data using the access token.
The GetAToken web activity does a post to https://accounts.accesscontrol.windows.net/ee780cdf-8eab-4e6f-a740-c31a2aede2c0/tokens/OAuth/2
with the body:
grant_type=client_credentials&client_id=016dfe90-1b12-4938-8a9a-dee02a43d013#ee780cdf-8eab-4e6f-a740-c31a2aede2c0&client_secret={mysecrethere}&resource=00000003-0000-0ff1-ce00-000000000000/russellwgove.sharepoint.com.sharepoint.com#ee780cdf-8eab-4e6f-a740-c31a2aede2c0
When I debug, This runs successfully and returns this object containing the token:
{
"token_type": "Bearer",
"expires_in": "86399",
"not_before": "1667487425",
"expires_on": "1667574125",
"resource": "00000003-0000-0ff1-ce00-000000000000/russellwgove.sharepoint.com.sharepoint.com#ee780cdf-8eab-4e6f-a740-c31a2aede2c0",
"access_token": "{the token is here}",
"ADFWebActivityResponseHeaders": {
"Pragma": "no-cache",
"Strict-Transport-Security": "max-age=31536000; includeSubDomains",
"X-Content-Type-Options": "nosniff",
"x-ms-request-id": "32926e95-5588-42ec-a8b3-349fef942a00",
"x-ms-ests-server": "2.1.14059.10 - EUS ProdSlices",
"X-XSS-Protection": "0",
"Cache-Control": "no-store, no-cache",
"P3P": "CP="DSP CUR OTPi IND OTRi ONL FIN"",
"Set-Cookie": "fpc=AgaNWKRvGG9IkIzP4suqH9H9VI5sAQAAAO3O9doOAAAA; expires=Sat, 03-Dec-2022 15:02:05 GMT; path=/; secure; HttpOnly; SameSite=None;esctx=AQABAAAAAAD--DLA3VO7QrddgJg7Wevrrm262sBqfXG85d6ros_Ik0DCezx_KFOnktHyOEHyz8OREffRB2ad9hCwezrn2CFOzyOu5ttnkxBd1-vfkQL6eU3a6-qGSd_SaxdNREiiyLIMJIyBPp8qQU5zM1ySi6c7LVde0JFJ3jRtgH7p5QOVD4glxgUfLkK273i69DivI0G_x3wQqkpy6FLpZa2XXOjSYwZPPm1tHc_wPVBp1zd_vF3IpLLIa_pEbA_ZsTr0HscgAA; domain=.accounts.accesscontrol.windows.net; path=/; secure; HttpOnly; SameSite=None;x-ms-gateway-slice=estsfd; path=/; secure; httponly;stsservicecookie=estsfd; path=/; secure; httponly",
"Date": "Thu, 03 Nov 2022 15:02:05 GMT",
"Content-Length": "1467",
"Content-Type": "application/json; charset=utf-8",
"Expires": "-1"
},
"effectiveIntegrationRuntime": "AutoResolveIntegrationRuntime (Central US)",
"executionDuration": 0,
"durationInQueue": {
"integrationRuntimeQueue": 0
},
"billingReference": {
"activityType": "ExternalActivity",
"billableDuration": [
{
"meterType": "AzureIR",
"duration": 0.016666666666666666,
"unit": "Hours"
}
]
}
}
The GetListData activity is triggered by the OnSuccess trigger from the GetAToken Activity. It makes a GET request to https://russellwgove.sharepoint.com/sites/tr/US/_api/Web/Lists(guid'233dd303-1ae3-422b-8960-ad53661e8ef6')/Items to get the list data. It has an Authorization header set to :
#{concat('Authorization: Bearer ', activity('GetAToken').output.access_token)}
When I debug,the GetListData activity fails with an error 2108. And a message :
Error calling the endpoint 'https://russellwgove.sharepoint.com'. Response status code: 'NA - Unknown'. More details: Exception message: 'NA - Unknown [ClientSideException] The format of value 'Authorization: Bearer {myTokenhere}' is invalid.'.
Request didn't reach the server from the client. This could happen because of an underlying issue such as network connectivity, a DNS failure, a server certificate validation or a timeout.
I have no idea what that message means 'Request didn't reach the server from the client. This could happen because of an underlying issue such as network connectivity, a DNS failure, a server certificate validation or a timeout.' What is the server and the client is this context?
Anyone has any ideas how to make this work?