如何获得Play Framework Play 2.3.8的securesocial库？

Question

有链接http://securesocial.ws/guide/installation.html。但它无效。得到错误： -

 build.sbt:15: error: object Project is not a member of package play
 val main = play.Project(appName, appVersion,        
 appDependencies).settings(
              ^
 sbt.compiler.EvalException: Type error in expression
 at sbt.compiler.Eval.checkError(Eval.scala:343)
 at sbt.compiler.Eval.compileAndLoad(Eval.scala:165)

github中有一个例子https://github.com/jaliss/securesocial/tree/3.0-M1

无法构建它。错误： -

  securesocial/samples/scala/demo/scalaDemo.sbt:1: error: not found:      
 object PlayKeys
 import PlayKeys._
        ^ 
 [error] Type error in expression
 Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore?

是否有任何可行的例子？那怎么弄呢？