add partial documentation for dueDate parameter in /api/v3/tasks/user and related code

website/server/controllers/api-v3/tasks.js

@@ -270,6 +270,7 @@ api.createChallengeTasks = {
  * @apiGroup Task
  *
  * @apiParam (Query) {String="habits","dailys","todos","rewards","completedTodos"} type Optional query parameter to return just a type of tasks. By default all types will be returned except completed todos that must be requested separately. The "completedTodos" type returns only the 30 most recently completed.
+ * @apiParam (Query) [dueDate]
  *
  * @apiSuccess {Array} data An array of tasks
  *

website/server/libs/taskManager.js

@@ -148,6 +148,7 @@ export async function createTasks (req, res, options = {}) {
  * @param  options.user  The user that these tasks belong to
  * @param  options.challenge  The challenge that these tasks belong to
  * @param  options.group  The group that these tasks belong to
+ * @param  options.dueDate
  * @return The tasks found
  */
 export async function getTasks (req, res, options = {}) {