Disconnect
To disconnect from MsGraph call a ->disconnect() method.
The disconnect will send a POST request to MsGraph to revoke the connection, in addition, the stored token will be deleted.
MsGraph::disconnect($redirectPath = '/', $logout = true);
Passing $logout = true will do an auth()->logout call $redirectPath will be used to determine where to redirect to after disconnecting from Graph.
Typically, you only want to run this is there is a connection, so it makes sense to wrap this in a ->isConnected() check:
if (MsGraph::isConnected()) {
MsGraph::disconnect();
}