Awesome
akka-http-oauth2-provider 
This library is enabled using scala-oauth2-provider in Akka HTTP.
Setup
Add "akka-http-oauth2-provider" to library dependencies of your project.
libraryDependencies ++= Seq(
"com.nulab-inc" %% "scala-oauth2-core" % "1.5.0",
"com.nulab-inc" %% "akka-http-oauth2-provider" % "1.4.0"
)
| Library version | Akka HTTP version |
|---|---|
| 1.4.0 | 10.1.x |
| 1.3.0 | 2.4.x |