I need help figuring out my error. I am using Alteryx to POST to add a user to a permission group in SP2013. The components of how it's compiled are similar to this post: Add a user to SP group using REST API
URLToAddUser: https://team.global.abcd/sites/SiteName/_api/web/sitegroups(4321)/users
Headers:
Accept: application/json;odata=verbose
Content-Type: application/json;odata=verbose
X-RequestDigest: myauthenticationNumber
body/JSON: "{'__metadata':{'type':'SP.User'},'LoginName':'i:0#.w|abcd\12345678'}"
DownloadData Error
{"error":{"code":"-1, Microsoft.SharePoint.Client.InvalidClientQueryException","message":{"lang":"en-US","value":"Invalid JSON. A token was not recognized in the JSON content."}}}