The specified user cannot be found

Hi there, I'm using the .NET integration guide found here to create a package: https://docs.esignlive.com/content/c_integrator_s_guide/sdk/a_introduction/getting_started_with_sdks.htm#Creating_Your_First_Document_Package When running this portion of the sample code I get the error below: PackageId packageId = eslClient.CreatePackage(package); Could not create a new package. Exception: The remote server returned an error: (404) Not Found. HTTP POST on URI https://sandbox.e-signlive.ca/api/packages. Optional details: {"code":404,"technical":"Could not find user with uid 'YlxUKBsCTmIC'","messageKey":"error.notFound.userNotFound","message":"The specified user cannot be found.","name":"Resource Not Found"} I am using my canadian sandbox account with the API key in my Admin.