Sharepoint API Authentication - Powershell

Question

Hello Everyone,

I want to use Sharepoint's Rest API to read and write to different documents but I dont know to get the auth token. Can any one explain the process to generate/create an auth token and how to use in a script to read an excel sheet?

Answer 1

Hi @M Usman Siddiqui,

If you want to use Sharepoint's Rest API to read a file in sharepoint. You will need register a SharePoint app only first. Please refer to the following steps to register a sharepoint app first in the document

https://learn.microsoft.com/en-us/sharepoint/dev/solution-guidance/security-apponly-azureacs

Then you can use the client id and secret to connect sharepoint with pnp powershell and use Invoke-PnPSPRestMethod to call rest api

#Site collection URL
$SiteURL = "https://crescent.sharepoint.com/sites/xxx"
#Connect to SharePoint Online with ClientId and ClientSecret
Connect-PnPOnline -Url $SiteURL -ClientId "yourclientid" -ClientSecret "yoursecret"
$output = Invoke-PnPSPRestMethod -Url '/_api/web/lists?$select=Id,Title'
$output.value

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