try using npmrc

npm-packages/license_checker.yml

-#do artifactory connections
-include: 
-  - https://git.code.tecnalia.com/digicon-webxr-store/ci-files/-/raw/test/npm-packages/artifactory_connect.yml
-
 before_script:
   # Set PACKAGE_DIR to "." if not already defined. # PACKAGE_DIR should point to where the package.json file is
   - PACKAGE_DIR=${PACKAGE_DIR:-"."}
@@ -24,12 +20,15 @@ license_check:
         - $PACKAGE_DIR/node_modules
         - $PACKAGE_DIR/package-lock.json
     script:
-      # connect job from artifactory_connect.yml
-      - !reference [.connect, script]   
       # Change to the directory containing package.json
       - cd $PACKAGE_DIR
-      # install dependencies
-      - jfrog rt npmi $NPM_REPO_URL
+      # create config file
+      - touch ".npmrc"
+      # write config json to config file
+      - echo "$NPMRCV2" >> .npmrc
+      # install dependencies using local .npmrc
+      - npm install
+      # check for licenses
       - jsgl --local ./ --verbose || exit 1
     only:
       - tags