Missing Authorization in connection string

Hi Anonymous 

What type of Auth is it? 

How does the Auth need to be provided? In encoded form like this?  

EncodedCredentials = "Basic " & Binary.ToText(Text.ToBinary(ClientID & ":" & Secret), BinaryEncoding.Base64),
    
    Token_Response  = Json.Document(Web.Contents(api_url,
    [ 
      Headers = [#"Content-Type"="application/x-www-form-urlencoded",#"Authorization"=EncodedCredentials],
      Content=Text.ToBinary("grant_type=client_credentials")
    ]
    )
    )

Or plain text?

data= Json.Document(Web.Contents(api_url,
   [ 
     Headers = [#"Authorization"="Bearer "&token,#"Content-Type"="application/json"]
   ]
   )
   )

Regards

Phil

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