How to add a user to Web Application User Policy using PowerShell

To add a user to web application user policy using PowerShell , use the below PowerShell script

$userOrGroup = "i:0#.w|domain\user"

$displayName = "User-NTLM"

$webApp = Get-SPWebApplication("URL")

$policy = $webApp.Policies.Add($userOrGroup, $displayName)

$policyRole = $webApp.PolicyRoles.GetSpecialRole([Microsoft.SharePoint.Administration.SPPolicyRoleType]::FullControl)

$policy.PolicyRoleBindings.Add($policyRole)

$webApp.Update()