send_api_cmd() {
    answer=$(curl -s -k \
        --data-urlencode "user=$username" \
        --data-urlencode "password=$password" \
        --data-urlencode "cod=yes" \
        --data-urlencode "cmd=$1" \
        --data-urlencode "ab1=$2" \
        --data-urlencode "cd2=$3" \
        --data-urlencode "ef3=$4" \
        https://$host:$port/api/)
    return $answer
}