e and avoid vendor lock-in.</p><p>With the <a href=https://github.com/ibm-cloud-security/app-identity-and-access-adapter>App Identity and Access Adapter</a>, you can use any OAuth2/OIDC provider: IBM Cloud App ID, Auth0, Okta, Ping Identity, AWS Cognito, Azure AD B2C and more. Authentication and authorization policies can be applied in a streamlined way in all environments — including frontend and backend applications — all without code changes or redeploys.</p><h2 id=understanding-istio-and-the-adapter