Simplify BasicAuthenticator.extractCredentials() & change unnecessary nullable type

Author: YektaDev

oauth2-server-core/src/main/java/nl/myndocs/oauth2/request/auth/BasicAuthenticator.kt

@@ -5,11 +5,9 @@ import nl.myndocs.oauth2.request.CallContext
 import nl.myndocs.oauth2.request.headerCaseInsensitive
 
 open class BasicAuthenticator(protected val context: CallContext) {
-    fun extractCredentials(): Credentials? {
-        val authorizationHeader = context.headerCaseInsensitive("authorization") ?: ""
-
-        return BasicAuth.parseCredentials(authorizationHeader)
-    }
+    fun extractCredentials() = BasicAuth.parseCredentials(
+        context.headerCaseInsensitive("authorization") ?: ""
+    )
 
     fun openAuthenticationDialog() {
         context.respondHeader("WWW-Authenticate", "Basic realm=\"${context.queryParameters["client_id"]}\"")