Cordova@7 does not prompt for password when installing from private git repo

Discovered plugin "private-cordova-plugin" in config.xml. Adding it to the project
Failed to restore plugin "private-cordova-plugin" from config.xml. You might need to try adding it again. Error: Failed to fetch plugin private-cordova-plugin@dpogue/private-cordova-plugin via registry.
Probably this is either a connection problem, or plugin spec is incorrect.
Check your connection and plugin name/version/URL.
Failed to get absolute path to installed module