Azure HTTP Trigger. How to avoid everytime the login - azure-http-trigger

Question

I have an Azure HTTP trigger function.
And it all works, except that I am executing everytime the slow
Connect-ExchangeOnline -Credential $Credential
How can I re-use the security token so it is only once slow.
And instead of using a normal login account, can I also use an applicationID and secret?
using namespace System.Net
param($Request, $TriggerMetadata)
$body = #{}
$user = "xxx#contoso.com"
$password = "example_password"
$securePassword = $password | ConvertTo-SecureString -AsPlainText -Force
$Credential = new-Object System.Management.Automation.PSCredential($user,$securePassword)
try {
Connect-ExchangeOnline -Credential $Credential
$filter = $Request.Body
$wildCard = $filter.wildCard
$SharedMailboxes = Get-Mailbox -RecipientTypeDetails SharedMailbox -ResultSize:1000 $wildcard|
Select-Object Identity,User,AccessRights,SamaccountName, PrimarySmtpAddress,City ,UsageLocation,IsDirSynced, DisplayName,HiddenFromAddressListsEnabled, GrantSendOnBehalfTo, ExmployeeID
$body.values = $SharedMailboxes
}
catch {
Write-Error $_.Exception.Message
$body.error = $_.Exception.Message
}
finally {
Disconnect-ExchangeOnline -Confirm:$false
}
Push-OutputBinding -Name Response -Value ([HttpResponseContext]#{
StatusCode = [HttpStatusCode]::OK
Body = $body
})