Redmine

I'm using "JAVA API 1.14" and "Redmine 1.2.1", this is correct? because this code:

RedmineManager RedmineManager redmineManager = new (url, login, password);
System.out.println (redmineManager.getUsers ());

causes this error:

Exception in thread" main "com.taskadapter.redmineapi.RedmineAuthenticationException: Authorization error. Please check if you provided a valid API access key or Login and Password and REST API service is enabled on the server.
at com.taskadapter.redmineapi.internal.comm.ComposingHandler.processContent (ComposingHandler.java: 25)
at com.taskadapter.redmineapi.internal.comm.ComposingHandler.processContent (ComposingHandler.java: 25)
at com.taskadapter.redmineapi.internal.comm.BaseCommunicator.sendRequest (BaseCommunicator.java: 89)
at com.taskadapter.redmineapi.internal.comm.FmapCommunicator.sendRequest (FmapCommunicator.java: 26)
at com.taskadapter.redmineapi.internal.comm.FmapCommunicator.sendRequest (FmapCommunicator.java: 26)
at com.taskadapter.redmineapi.internal.comm.BasicSimplifier.sendRequest (BasicSimplifier.java: 24)
at com.taskadapter.redmineapi.internal.Transport.getObjectsList (Transport.java: 368)
at com.taskadapter.redmineapi.internal.Transport.getObjectsList (Transport.java: 335)
at com.taskadapter.redmineapi.RedmineManager.getUsers (RedmineManager.java: 358)
at app.Main.main (Main.java: 36)

there is something wrong with this version?