Currently, the SVN plugin Subclipse does not offer a built-in way to change SVN credentials. To do this you have to manually delete the cached files that store the credentials.
- First discard the location from the SVN Repository perspective.
- Close the studio.
- Navigate to (Windows): C:\Users\<USERNAME>\AppData\Roaming\Subversion\auth\svn.ssl.server (Mac): /Users/<USERNAME>/.eclipse/org.eclipse.equinox.security/secure_storage
- Delete the files in this location.
- Restart the studio.
- Add the location back.