Introducing envVarMappings for Provider Credentials

Running multiple providers with different credentials in the same Pulumi program has always been tricky. Providers expect fixed environment variable names like AWS_ACCESS_KEY_ID or ARM_CLIENT_SECRET , so if you need two AWS providers targeting different accounts, you couldn’t configure them both via environment variables. Pulumi v3.220.0 introduces envVarMappings , a new resource option that solves this problem by letting you remap provider environment variables to custom keys.