AccessToken never expires

[xring]

scala-oauth2-provider/src/main/scala/scalaoauth2/provider/DataHandler.scala

Line 23 in dbed51d

 val expiresIn: Option[Long] = expirationTimeInMilis map { expTime => 

the expiresIn will never change after initial.

[Tsuyoshi Yoshizawa]

The reason is from Avoid response where 'expiresIn' could be negative #107
The expires value will fix on creating AccessToken instance.

[xring]

Got it, that make sense. Thanks @tsuyoshizawa .