@Chelseam
First, you need to ensure that all the Roku devices on your account are your Roku devices. You see, Disney Plus could be using Single Sign On, and be automatically signing in on all devices with that app and Disney Plus account attached.
So, go to https://my.roku.com and scroll all the way to the bottom. See those Roku devices? If any aren't yours, remove/unlink them.
Next, go to your Subscriptions page and see if there's a Disney Plus subscription tied to your Roku account. If so, is that the account that's being used? If so, you're paying for it. Or whoever's credit card is tied to your Roku account is paying for it. Which means you may need to look at your Payments page and make any changes there, or remove payment method altogether. And cancel any Disney Plus subscription.
Don't proceed until you have it all correct and that it's your Roku account, your payment method (if you have a payment method; it's not required), and your devices that you have all tied together, with none missing and no extras.
Next, go to your Roku device and remove Disney Plus. Then reboot that Roku device. Then, go to all your Roku devices and reboot them. All of them. All those listed at the bottom of the page you looked at earlier.
Once done, that has removed Disney Plus from each device, and cleared out all data from every device.
Now, go back to your first Roku device and reinstall Disney Plus. You should be prompted to log in. Which is, I think, what you were after.
DBDukes
Roku Community Streaming Expert
Note: I am not a Roku employee.
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