fixed Logout from Sandbox not working #69

[hmuronaka]

No description provided.

[mike4aday]

@hmuronaka is the host associated value needed at all? What do you think of:

case let .revoke(token):
    guard let host = authData.identityURL.host, let url = URL(string: "https://\(host)/services/oauth2/revoke") else { 
//...

[hmuronaka]

I think host parameter of revoke() and refresh() is unnecessary. But I couldn't judge to change method signature ( like from revoke(token, host) to revoke(token).

I fixed it according to your point, is it good?

[mike4aday]

Thank you very much @hmuronaka - let me review.