cypress-iap v2.0.1
Cypress-IAP 
 
Cypress Identity Aware Proxy(IAP)
This Cypress plugin overwrites the cy.visit command and builds authentication capability google-auth-library to access applications behind Identity Aware Proxy(IAP). If the the cypress baseUrl is localhost, the original cy.visit function is returned.
Installation
Install the package using npm:
npm i -D cypress-iapAnd add the following at the beginning of your setup file at cypress/support/index.js:
import 'cypress-iap/visit';Register the plugin
Register the plugin in your cypress/plugins/index.js file like this:
module.exports = (on, config) => {
    require('cypress-iap/utils')(on, config);
    return config;
};Google Service Account
A google service account should be created within your google cloud project. Upon creation, store the keyfile that is auto generated.
Create a google service account
Do NOT check this file in to your remote repository. Store it outside of your project or .gitignore / .dockerignore your keyfile.
Example google cloud service account
keyfile.json
{
  "type": "service_account",
  "project_id": "<project_id>",
  "private_key_id": "<private_key_id",
  "private_key": "-----BEGIN PRIVATE KEY-----\n <private_key> \n-----END PRIVATE KEY-----\n",
  "client_email": "<service_account_name>@<google_cloud_project>.iam.gserviceaccount.com",
  "client_id": "<client_id>",
  "auth_uri": "https://accounts.google.com/o/oauth2/auth",
  "token_uri": "https://oauth2.googleapis.com/token",
  "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
  "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/<google_clould_project>.iam.gserviceaccount.com"
}Set GOOGLE_APPLICATION_CREDENTIALS env variable
Ensure the GOOGLE_APPLICATION_CREDENTIALS environment variable is set to the credentials path of the credentials file.
export GOOGLE_APPLICATION_CREDENTIALS=path/to/keyfile.jsonAlternatively you can use third party plugin called as-a and in your as-a.ini you can set the following configuration:
as-a.ini
[auth-me]
GOOGLE_APPLICATION_CREDENTIALS=keyfile.jsonThis command will execute the as-a package set the variables defined under [auth-me].
as-a auth-me cypress run