The Profile screen should have a button "Change Password"
Once the button is clicked fields appear: one for the old password and one for the new one (nice to have: a third field to verify correct spelling of the new password)
Also there should appear buttons "Abbrechen" and "Speichern"
If Abbrechen is pressed, the old passowrd remains
If "Speichern" is pressed and all fields above are entered correctly, the new password is saved
If fields are not entered correctly, e.g wrong old password or missing new password, the user will receive an error message (red text)
User story
Acceptance criteria
Definition of done