https://www.rokucom-support.com/how-to-reset-roku-pin/ Go to go.roku.com/pin Login to your Roku account. Make sure you are adding the right details while logging in to the account. Open the pin settings menu. You can find it under the update option.
You can update the pin here by entering the four-digit code under the given section. Here you will be provided with other options as well in the settings menu. So, you can select as per preference.
To save the pin click on the save settings option.
If you are unable to update the pin or if Roku pin reset is unsuccessful try getting help from the Roku technical support team.