npm login against Nexus https://packages.nuxeo.com/

npm-login-mavenin.sh

(
export NPM_USER=<LdapUsername>
export NPM_PASS=<LdapPassword>
export NPM_EMAIL=<GitHubEmail>
sudo npm install -g npm-cli-adduser
npm config set email $NPM_EMAIL
for repo in $(curl -s -u "$NPM_USER:$NPM_PASS" -X GET "https://mavenin.nuxeo.com/nexus/service/rest/v1/repositories" -H  "accept: application/json"|jq -r ' .[] | select(.format == "npm") | .name'); do
    [[ $repo == "npm-internal" ]] && continue
    echo $repo
    npm-cli-adduser -r https://mavenin.nuxeo.com/nexus/repository/$repo/
    echo
done
unset NPM_PASS
)

npm-login.sh

(
export NPM_USER=<GitHubUsername>
export NPM_PASS=<GitHubToken>
export NPM_EMAIL=<GitHubEmail>
sudo npm install -g npm-cli-adduser
npm config set email $NPM_EMAIL
npm config set registry https://packages.nuxeo.com/repository/npm-internal
npm-cli-adduser
npm-cli-adduser -s @nuxeo
for repo in $(curl -s -u "$NPM_USER:$NPM_PASS" -X GET "https://packages.nuxeo.com/service/rest/v1/repositories" -H  "accept: application/json"|jq -r ' .[] | select(.format == "npm") | .name'); do
    [[ $repo == "npm-internal" ]] && continue
    echo $repo
    npm-cli-adduser -r https://packages.nuxeo.com/repository/$repo/
    echo
done
unset NPM_PASS
)

Needs jq https://stedolan.github.io/jq/download/

Use a GitHub token as password : https://github.com/settings/tokens/new?scopes=read:org