not install cordova-plugin-unity

[binita12345]

i want to install "cordova plugin add io.mgcrea.Unity" in my cordova project using ionic cordova cli, but not intalling. when i fire "ionic cordova plugin add io.mgcrea.Unity", i am getting following error:

✖ Running command - failed!

[ERROR] Cordova encountered an error.
    You may get more insight by running the Cordova command above directly.
    
[ERROR] An error occurred while running cordova plugin add io.mgcrea.Unity --save (exit code 1):
    
    Error: Registry returned 404 for GET on https://registry.npmjs.org/io.mgcrea.Unity

what is the solution to solve this problem?
how can i install this plugin?

[binita12345]

how to install cordova unity plugin using "cordova plugin add io.mgcrea.Unity" ?