Disconnect-MgGraph 
	Once you're signed in, you'll remain signed in until you invoke Disconnect-MgGraph. Microsoft Graph PowerShell automatically refreshes the access token for you and sign-in persists across PowerShell sessions because Microsoft Graph PowerShell securely caches the token.
Syntax
		__AllParameterSets
	  
	Disconnect-MgGraph
	Description
Use Disconnect-MgGraph to sign out.
Examples
Using Disconnect-MgGraph 
	PS C:> Disconnect-MgGraph
Use Disconnect-MgGraph to sign out.