SSL_get_srp_username
p->login = SSL_get_srp_username(s);
OSSL_DEPRECATEDIN_3_0 __owur char *SSL_get_srp_username(SSL *s);
if (strcmp(ctx_data->srp_user, SSL_get_srp_username(s)) != 0)
username = SSL_get_srp_username(s);