Zabbix UserIp update

#!/bin/bash
# Remove-Zabbix Init script should run when an AWS instance goes down and remove itself from Zabbix Server
# chkconfig: - 84 02
# description: Remove from zabbix
# Source function library.
HOST_NAME=$2

USER='Admin'
PASS='zabbix'
ZABBIX_SERVER='192.168.100.150'
API='http://192.168.100.150/zabbix/api_jsonrpc.php'

# Authenticate with Zabbix API

echo $HOST_NAME

echo $USER

echo $PASS

app=`curl -s -H  'Content-Type: application/json-rpc' -d  '{"jsonrpc": "2.0","method":"user.login","params":{"user":"'$USER'","password":"'$PASS'"},"auth": null,"id":0}' $API`

#{"jsonrpc":"2.0","result":"305c41fa941f185a586e332a68f1312d","id":0}

AUTH_TOKEN=`echo $app| ./jq '.result'`

echo $AUTH_TOKEN

#curl -s -H 'Content-Type: application/json-rpc' -d '{"jsonrpc": "2.0","method":"host.get","params":{"output":"extend","filter":{"host":["postgre"]}},"auth":"305c41fa941f185a586e332a68f1312d","id":0}' http://192.168.100.150/zabbix/api_jsonrpc.php

app=`curl -s -H 'Content-Type: application/json-rpc' -d '{"jsonrpc": "2.0","method":"host.get","params":{"output":"extend","filter":{"host":["'$HOST_NAME'"]}},"auth":'$AUTH_TOKEN',"id":0}' $API`

HOST_ID=`echo $app| ./jq '.result[0].hostid'`

echo $HOST_ID

#GET HOST INTERFACE

app=`curl -s -H 'Content-Type: application/json-rpc' -d '{"jsonrpc": "2.0","method": "hostinterface.get","params": {"output": "extend","hostids": '$HOST_ID'},"auth": '$AUTH_TOKEN',"id": 0}' $API`

#{"jsonrpc":"2.0","result":[{"interfaceid":"67","hostid":"10177","main":"1","type":"1","useip":"1","ip":"192.168.100.154","dns":"","port":"10050","bulk":"1"}],"id":0}

INTERFACE_ID=`echo $app| ./jq '.result[0].interfaceid'`

HOST_IP=`echo $app| ./jq '.result[0].ip'`

HOST_IP=$(echo $HOST_IP | sed 's/^"\(.*\)"$/\1/')

echo $HOST_IP
echo $1

if [ "$HOST_IP" = "$1" ]; then
    exit 0
else
       app=`curl -s -H 'Content-Type: application/json-rpc' -d '{"jsonrpc": "2.0","method": "hostinterface.update","params": {"interfaceid": '$INTERFACE_ID',"ip":"'$1'"},"auth": '$AUTH_TOKEN' ,"id": 0}' $API`

fi