Error codes list


 * SUCCESS                            0
 * WRONG_TOKEN_ERROR                  1
 * USER_ALREADY_EXIST_ERROR           2
 * USER_DOES_NOT_EXIST_ERROR          3
 * CHANNEL_ALREADY_EXIST_ERROR        4
 * CHANNEL_DOES_NOT_EXIST_ERROR       5
 * SUBSCRIPTION_ALREADY_EXIST         6
 * INTERNAL_DB_ERROR                  7
 * INCORRECT_QUERY_NAME_ERROR         8
 * INCORRECT_JSON_ERROR               9
 * INCORRECT_CREDENTIALS_ERROR        10
 * CHANNEL_NOT_SUBCRIBED_ERROR        11
 * CHANNEL_ALREADY_SUBSCRIBED_ERROR   12
 * TAG_DOES_NOT_EXIST_ERROR           13
 * TAG_ALREADY_EXIST_ERROR            14
 * NULL_TIMESLOT_ERROR                15
 * UNKNOWN_ERROR                      16
 * TMP_USER_ALREADY_EXIST_ERROR       17
 * NETWORK_ERROR                      18
 * EMAIL_ALREADY_EXIST_ERROR          19
 * WEAK_PASSWORD_ERROR                20
 * NOT_SUPPORTED                      21
 * DB_DOES_NOT_EXIST_ERROR            22
 * USER_DOES_NOT_OWN_CHANNEL_ERROR    23