Further improved documentation

Author: J0B10

.gitignore

@@ -33,3 +33,4 @@ project/plugins/project/
 /bin/
 /lib/
 /deploy/
+/wiki/

src/main/scala/org/codeoverflow/chatoverflow/requirement/service/sample/SampleConnector.scala

@@ -5,12 +5,14 @@ import org.codeoverflow.chatoverflow.connector.Connector
 
 class SampleConnector(override val sourceIdentifier: String) extends Connector(sourceIdentifier) with WithLogger {
   override protected var requiredCredentialKeys: List[String] = List()
-  override protected var optionalCredentialKeys: List[String] = List()
+  override protected var optionalCredentialKeys: List[String] = List("optionalSample")
 
   /**
     * Starts the connector, e.g. creates a connection with its platform.
     */
   override def start(): Boolean = {
+    val optionalSample: Option[String] = credentials.get.getValue("optionalSample")
+    if (optionalSample.isEmpty) logger info "Credentials value optionalSample was not set"
     logger info s"Started sample connector! Source identifier is: '$sourceIdentifier'."
     true
   }