Use AuthToken for cal to Search API (#6624)

Co-authored-by: Chidozie Ononiwu <chononiw@microsoft.com>

eng/common/scripts/Helpers/ApiView-Helpers.ps1

@@ -132,7 +132,7 @@ function Set-ApiViewCommentForRelatedIssues {
   . ${PSScriptRoot}\..\common.ps1
   $issuesForCommit = $null
   try {
-    $issuesForCommit = Search-GitHubIssues -CommitHash $HeadCommitish
+    $issuesForCommit = Search-GitHubIssues -CommitHash $HeadCommitish -AuthToken $AuthToken
     if ($issuesForCommit.items.Count -eq 0) {
       LogInfo "No issues found for commit: $HeadCommitish"
       Write-Host "##vso[task.complete result=SucceededWithIssues;]DONE"

eng/common/scripts/Invoke-GitHubAPI.ps1

@@ -560,12 +560,17 @@ function Search-GitHubIssues {
     [ValidateNotNullOrEmpty()]
     [Parameter(Mandatory = $true)]
     $CommitHash,
-    $State="open"
+    $State="open",
+    $AuthToken
   )
   $uri = "https://api.github.com/search/issues?q=sha:$CommitHash+state:$State"
-
-  return Invoke-RestMethod `
-          -Method GET `
-          -Uri $uri `
-          -MaximumRetryCount 3
+  $params = @{
+    Method = 'GET'
+    Uri = $uri
+    MaximumRetryCount = 3
+  }
+  if ($AuthToken) {
+    $params.Headers = Get-GitHubApiHeaders -token $AuthToken
+  }
+  return Invoke-RestMethod @params
 }