Your bank credentials are secured in Outbank with your App password. This password was assigned by you personally at the first use of Outbank and confirmed again. It should therefore only be known by you. Changing or bypassing the password externally ‘from the outside’ is not possible, as there is no reset button or password forgotten function.
Tip: If you have configured the Apple service "Find My iPhone / iPad / Mac" on your device, you can try to locate your device or remotely delete data.

Please read the following: https://support.apple.com/en-us/HT201472