Set the #WebKitCredential of the proposed authentication challenge that was
stored from a previous session. This should only be used by applications handling
their own credential storage. (When using the default WebKit credential storage,
webkit_authentication_request_get_proposed_credential() already contains previously-stored
credentials.)
Passing a %NULL @credential will clear the proposed credential.
Set the #WebKitCredential of the proposed authentication challenge that was stored from a previous session. This should only be used by applications handling their own credential storage. (When using the default WebKit credential storage, webkit_authentication_request_get_proposed_credential() already contains previously-stored credentials.) Passing a %NULL @credential will clear the proposed credential.