Error while running Oxidized

I know this may have been before but i am stack. While starting up oxidized (config mgmt tool) for the first time, i am running into an error "Error loading config: (<unknown>): did not find expected key while parsing a block mapping at line 27 column 4" below are my config and router.db settings

router.db

192.168.223.10:cisco:muhsin:muhsin:muhsin

​

config

---

username: muhsin

password: muhsin

model: cisco

interval: 3600

use_syslog: false

debug: false

threads: 30

timeout: 20

retries: 3

prompt: !ruby/regexp /^([\w.@-]+[#>]\s?)$/

rest: 0.0.0.0:8888

vars:

enable: muhsin

groups: {}

pid: /home/oxidized/.config/oxidized/pid

input:

default: ssh, telnet

debug: false

ssh:

secure: false

output:

default: file

file:

directory: /home/oxidized/configs

source:

default: csv

csv:

file: /home/oxidized/.config/oxidized/router.db

delimiter: !ruby/regexp /:/

map:

name: 0

model: 1

username: 2

password: 3

vars_map:

enable: 4

remove_secret: true

model_map:

cisco: ios

​

i am running it on ubuntu 16.04.6 LTS . Why am i doing wrong. I am an absolute newbie