As the Get Users Endpoint states: “If neither a user ID nor a login name is specified, the user is looked up by Bearer token.”
If you omit both mentioned parameters, the token will be used as the source instead, giving you what you want 
As the Get Users Endpoint states: “If neither a user ID nor a login name is specified, the user is looked up by Bearer token.”
If you omit both mentioned parameters, the token will be used as the source instead, giving you what you want