void function ( Request arg0 ) { }
verifies whether there are any user credentials registered for the call that `` request '' belongs to and appends corresponding authorization headers if that is the case . concode_field_sep SipProvider transactionCreator concode_elem_sep CredentialsCache cachedCredentials concode_elem_sep HeaderFactory headerFactory concode_elem_sep UserCredentials defaultCredentials concode_elem_sep SipManager sipManCallback concode_field_sep void setTransactionCreator concode_elem_sep void setHeaderFactory concode_elem_sep ClientTransaction handleChallenge concode_elem_sep UserCredentials getDefaultCredentials concode_elem_sep void setSipManCallback concode_elem_sep AuthorizationHeader getAuthorization concode_elem_sep void setDefaultCredentials concode_elem_sep void cacheCredentials