[OpenSER-Users] Modify $au to lowercase

[Peter P GMX]

Hello,

is there any chance to modify the authorization user name?

I have the following scenario. We do allow only lowercase usernames when 
users are registering. So the md5 password is created and stored based 
on lowercase letters.
When a user receives his account data he might enter his username in 
camelcase in his user agent. So when he tries to register, it fails, as 
the md5 hash based on the camelcased username is different.

I tried to use the perl module, put the username to lowercase and put it 
back to OpenSER via avp_pushto. But Openser only allows $ru,$du,$br to 
be modified.

Do I have a chance to modify $au?

Best regards
Peter