Could not authenticate to SharePoint Online using OAuth 2.0

 $username = "test@am.onmicrosoft.com"

$password = "******"

$cred = New-Object -TypeName System.Management.Automation.PSCredential -argumentlist $userName, $(convertto-securestring $Password -asplaintext -force)

Connect-SPOService -Url https://finders-admin.sharepoint.com -Credential $cred 

Workflow

• SP 2010 workflows executed runtime
• SP 2013 workflows runs workflow manger independently 
• It runs endlessly
• RestAPI calls are support
• History maintains in workflow history list
• impersonation step to act as a different user
• Workflow types: List workflow, site workflow and reusable workflow

Power Automate:

• It runs for 30 days only
• “service account” user with a Power Automate license and run these flows with that user account
• History maintains in power automate dashboard
• impersonation step is not available
• Types: Single approval , sequential approval and parallel approvals