Worked on the nextcloud/server repository to address a critical issue in file sharing authentication, focusing on the persistence and validation of user-defined passwords. Using Vue.js and JavaScript for front end development, implemented a fix that ensures passwords entered by users are correctly saved and used, rather than defaulting to system-generated values. The solution involved binding the password input to user data and adding validation checks during shared file access, which reduced misconfigurations and improved security. This targeted patch enhanced the reliability of access control and led to a decrease in support tickets related to password handling for shared files.