Does logging out, stopping the bot, or clearing preferences remove its stored credentials?
No automatic credential deletion is established by those actions. The published policy says encrypted DeviceAuth is retained without automatic deletion; removing preferences, ending a web session, and stopping bot activity have different purposes from revoking that authorization.
Distinguish the records involved
A web session determines whether the current browser can access the website account. Bot preferences describe selections such as appearance and associated setup information. Epic authorization allows the hosted account to connect. Stopping activity or removing a preference does not necessarily remove the other records. This separation is visible in the cleanup code, which can remove unpaid trial preferences while retaining identity and credential information needed by other supported flows. Do not interpret a missing outfit selection as proof that account authorization was erased.
Read retention according to the category
The privacy page describes unpaid trial preference cleanup separately from retained minimal usage information and encrypted DeviceAuth. Paid bot preferences can also remain when the bot becomes inactive. Those statements should not be simplified into everything disappears when the timer ends or nothing is stored after logout. If you need to know what remains for a particular account, identify the relevant category and ask through the privacy contact. A browser refresh alone cannot verify the contents of every server or provider record.
Choose a matching control
Use Stop when you intend to stop current bot activity, account logout when you intend to end the web session, and the billing portal when you intend to manage recurring charges. Use Epic's own revocation process when the goal is to invalidate the game authorization. For stored service data, make an access or deletion request through the published contact. Keep each confirmation tied to its own operation, and do not share secret files or authorization values in an attempt to prove that one of those actions completed.