code: public void assignTask(int taskId, int responsible) {
  		getResourceFactory()
  				.getApiResource("/task/" + taskId + "/assign")
  				.entity(new AssignValue(responsible),
  						MediaType.APPLICATION_JSON_TYPE).post();
  	}
docs: Assigns the task to another user. This makes the user responsible for the
  task and its completion.
  
  @param taskId
  The id of the task to assign
  @param responsible
  The id of the user the task should be assigned to