I found a lot of examples on how to change the username for specific revisions and so on.
But what I need is this: I did a checkout with the authentication credentia
You can change the user with
Subversion 1.6 and earlier:
svn switch --relocate protocol://currentUser@server/path protocol://newUser@server/path
Subversion 1.7 and later:
svn relocate protocol://currentUser@server/path protocol://newUser@server/path
To find out what protocol://currentUser@server/path
is, run
svn info
in your working copy.