Environment variables are not being read

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10 
    const url = `${flyApiHostname}/v1/apps/${flyAppName}/machines`;
    const machineConfig = {
      config: {
        image: currentImage,
        size: "shared-cpu-1x",
        env: {
          DYNAMIC_KEY: dynamicKey,
        },
        services: [
              ...
        ],
        metadata: {
          fly_platform_version: "v2", 
          fly_process_group: "app", 
          user_machine: "true", 
          user_id: userId, 
          created_by: "user_machine_script", 
          created_at: new Date().toISOString(), 
        },
      },
      name: `${userId}`,
      region: "iad"
    };

For sure. It turns out the core problem I was trying to solve for is better solved by the fly replay router.