NRT Authentication Methods Changed for VIP Users

let security_info_actions = dynamic(["User registered security info", "User changed default security info", "User deleted security info", "Admin updated security info", "User reviewed security info", "Admin deleted security info", "Admin registered security info"]);
let VIPUsers = _GetWatchlist('VIPUsers')
| extend ["User Principal Name"] = column_ifexists("User Principal Name","")
| distinct ["User Principal Name"];
AuditLogs
| where Category =~ "UserManagement"
| where ActivityDisplayName in (security_info_actions)
| extend InitiatingAppName = tostring(InitiatedBy.app.displayName)
| extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)
| extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
| extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
| extend InitiatingIpAddress = tostring(iff(isnotempty(InitiatedBy.user.ipAddress), InitiatedBy.user.ipAddress, InitiatedBy.app.ipAddress))
| mv-apply TargetResource = TargetResources on 
  (
      where TargetResource.type =~ "User"
| extend Target = trim(@'"',tolower(tostring(TargetResource.userPrincipalName)))
  )
| where Target in~ (VIPUsers)
| summarize Start=min(TimeGenerated), End=max(TimeGenerated), Actions = make_set(ResultReason) by InitiatingUserPrincipalName, InitiatingAadUserId, InitiatingAppName, InitiatingAppServicePrincipalId, InitiatingIpAddress, Result, Target
| extend TargetName = tostring(split(Target,'@',0)[0]), TargetUPNSuffix = tostring(split(Target,'@',1)[0])
| extend InitiatedByName = tostring(split(InitiatingUserPrincipalName,'@',0)[0]), InitiatedByUPNSuffix = tostring(split(InitiatingUserPrincipalName,'@',1)[0])