List all the submissions that the connected user made. Returns list of the form

            ::

                [
                    {
                        "id": "submission_id1",
                        "submitted_on": "date",
                        "status" : "done",          #can be "done", "waiting", "error" (execution status of the task).
                        "grade": 0.0,
                        "input": {},                #the input data. File are base64 encoded.
                        "result" : "success"        #only if status=done. Result of the execution.
                        "feedback": ""              #only if status=done. the HTML global feedback for the task
                        "problems_feedback":        #only if status=done. HTML feedback per problem. Some pid may be absent.
                        {
                            "pid1": "feedback1",
                            #...
                        }
                    }
                    #...
                ]

            If you use the endpoint /api/v0/courses/the_course_id/tasks/the_task_id/submissions/submissionid,
            this dict will contain one entry or the page will return 404 Not Found.

def API_GET(self, courseid, taskid, submissionid):  # pylint: disable=arguments-differ
        """
            List all the submissions that the connected user made. Returns list of the form

            ::

                [
                    {
                        "id": "submission_id1",
                        "submitted_on": "date",
                        "status" : "done",          #can be "done", "waiting", "error" (execution status of the task).
                        "grade": 0.0,
                        "input": {},                #the input data. File are base64 encoded.
                        "result" : "success"        #only if status=done. Result of the execution.
                        "feedback": ""              #only if status=done. the HTML global feedback for the task
                        "problems_feedback":        #only if status=done. HTML feedback per problem. Some pid may be absent.
                        {
                            "pid1": "feedback1",
                            #...
                        }
                    }
                    #...
                ]

            If you use the endpoint /api/v0/courses/the_course_id/tasks/the_task_id/submissions/submissionid,
            this dict will contain one entry or the page will return 404 Not Found.
        """
        with_input = "input" in web.input()

        return _get_submissions(self.course_factory, self.submission_manager, self.user_manager, self.app._translations, courseid, taskid, with_input, submissionid)