NPM Login with Verdaccio having "max_users: -1" and solves error "user registration disabled"

npm_login.sh

#!/bin/bash

## Author : Jasti Sri Radhe Shyam (https://jastisriradheshyam.github.io)

function printHelp() {
    cat <<EOL
Usage:
    npm_login.sh [Flags]
    Flags:
        -h   print help
        --domain set the domain, (mandatory); usage: --domain DOMAIN_NAME
        --user set the username (mandatory); usage: --username REPOSITORY_USERNAME
        --pass set the password (mandatory if not used --askpass); usage: --password REPOSITORY_PASSWORD
               will overwritten if --askpass is used 
        --askpass asks the password from STDIN (recommended) (mandatory if not used --pass)
        --ssl_enabled (default : true), (optional) possibile values : true, false
        --set_registry_default will set the registry (domain) as default registry
EOL
}

ssl_enabled=true
http_protocol=https
set_registry_default=false

# parse flags
while [[ $# -ge 1 ]]; do
    key="$1"
    case $key in
    -h)
        printHelp
        exit 0
        ;;
    --domain)
        domain="$2"
        shift
        ;;
    --user)
        user="$2"
        shift
        ;;
    --pass)
        pass="$2"
        shift
        ;;
    --askpass)
        askpass="true"
        ;;
    --ssl_enabled)
        ssl_enabled="$2"
        shift
        ;;
    --set_registry_default)
        set_registry_default="true"
        ;;
    *)
        echo
        echo "Unknown flag: $key"
        echo
        printHelp
        exit 1
        ;;
    esac
    shift
done

if [ "${ssl_enabled}" != "true" -a "${ssl_enabled}" != "false" ]; then
    echo "ssl_enabled can only have values \"true\" or \"false\""
    exit 1
elif [ "${ssl_enabled}" == "false" ]; then
    http_protocol=http
fi

if [ -z "${user}" ]; then
    echo "Username not provided"
    exit 1
fi

if [ -z "${domain}" ]; then
    echo "Domain not provided"
    exit 1
fi

if [ -n "${askpass}" ]; then
    read -sp "Enter password: " pass
    echo -e ""
fi

if [ -z "${pass}" ]; then
    echo "Password not provided"
    exit 1
fi

request_time=$(date -u +"%Y-%m-%dT%H:%M:%S.0Z");

echo //$domain/:_authToken=$( curl --silent $http_protocol://$domain/-/user/org.couchdb.user:$user/-rev/undefined -u $user:$pass -X PUT \
    -d '{"_id":"org.couchdb.user:'$user'","name":"'$user'","password":"'$pass'","type":"user","roles":[],"date":"'$request_time'","ok":"you are authenticated as 'undefined'"}' \
    -H content-type:application/json |jq --raw-output .token ) > ~/.npmrc

# Useful when used with yarn
# Set in ~/.npmrc
# always-auth = true
npm config set always-auth true

# Add default registry
if [ "${set_registry_default}" == "true" ]; then
    npm config set registry ${http_protocol}://${domain}
fi

echo -e "\nDone with Authentication"