Persisting Azure Login across PowerShell Sessions

Now you can persist your azure login sessions across multiple sessions and even after reboots. Beginning with Azure PowerShell v4.4.0, you can enable the automatic saving and reuse of Azure Contexts whenever you open a new PowerShell session.

Run the below command in your powershell session and it will enable the autosave of the context.
Enable-AzureRmContextAutosave

Reference: Azure Context