@april.brandt
I have NR running on Unraid Docker, so you settings/filepaths would look a bit different.
I added a variable for authFile path and IP. Not sure if Port variable was needed, but it worked initially so i have left it
Using Proxy Method, i put the mapped variable as the authFile path

That worked for a while, then I started receiving a node error: “Unexpected end of JSON input”
Which I thought was due to it being an Australian account, as when i used my USA test account the cookie generated.
After those issues, i changed to saving the cookie in NR variable
[{"id":"f3ff139b.01dd3","type":"alexa-remote-init","z":"7b84f49a.9ad5cc","name":"","account":"49135c4f.6bdd74","option":"initialise","x":270,"y":80,"wires":[["74cd0c7b.325354"]]},{"id":"ba61ab31.e4d208","type":"inject","z":"7b84f49a.9ad5cc","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"00 00 * * 2,4,0","once":false,"onceDelay":0.1,"topic":"","payload":"alexa","payloadType":"flow","x":120,"y":80,"wires":[["f3ff139b.01dd3"]]},{"id":"74cd0c7b.325354","type":"change","z":"7b84f49a.9ad5cc","name":"set","rules":[{"t":"set","p":"alexa","pt":"flow","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":400,"y":80,"wires":[[]]},{"id":"2a1fc81f.b96e28","type":"comment","z":"7b84f49a.9ad5cc","name":"Alexa Init","info":"","x":90,"y":40,"wires":[]},{"id":"443b92d6.132dfc","type":"inject","z":"7b84f49a.9ad5cc","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"3600","crontab":"","once":true,"onceDelay":0.1,"topic":"","payload":"Started!","payloadType":"str","x":110,"y":140,"wires":[["6313cbe4.e7fc64"]]},{"id":"6313cbe4.e7fc64","type":"change","z":"7b84f49a.9ad5cc","name":"set","rules":[{"t":"set","p":"payload","pt":"msg","to":"alexa","tot":"flow"}],"action":"","property":"","from":"","to":"","reg":false,"x":260,"y":140,"wires":[["6c43f2b4.15104c"]]},{"id":"6c43f2b4.15104c","type":"alexa-remote-init","z":"7b84f49a.9ad5cc","name":"","account":"49135c4f.6bdd74","option":"initialise","x":390,"y":140,"wires":[[]]},{"id":"49135c4f.6bdd74","type":"alexa-remote-account","name":"Alexa AUS","authMethod":"cookie","proxyOwnIp":"192.168.20.10","proxyPort":"3456","cookieFile":"","refreshInterval":"3","alexaServiceHost":"alexa.amazon.com.au","amazonPage":"amazon.com.au","acceptLanguage":"en-US","userAgent":"","useWsMqtt":"on","autoInit":"on"}]

The file path should be blank, and auto Init set to OFF
But now that doesnt work for me - I get the “Unexpected end of JSON input” error again,
so im back to manually inputting the cookie!!! BUT that is getting old very quick!!!
Hopefully some of this might assist!!