Change dash auth signature

src/dash.c

@@ -354,7 +354,7 @@ static struct mg_dash_user *mg_dash_authenticate(struct mg_http_message *hm,
     struct mg_str *ah = mg_http_get_header(hm, "Authorization");
     if (ah != NULL) {
       // Auth header and password are set, auth by user/password via glue API
-      int num_users = 0, level = dash->authenticate(user, pass);
+      int num_users = 0, level = dash->authenticate(user, sizeof(user), pass);
       MG_DEBUG(("user %s, level: %d", user, level));
       if (level > 0) {  // Proceed only if the firmware authenticated us
         for (u = s_users; u != NULL && result == NULL;

src/dash.h

@@ -48,7 +48,7 @@ struct mg_dash_file {
 struct mg_dash {
   struct mg_field_set *sets;
   struct mg_dash_custom_handler *custom_handlers;
-  int (*authenticate)(const char *user, const char *pass);
+  int (*authenticate)(char *user, size_t userlen, const char *pass);
   int session_auto_expiration_seconds;
   //struct mg_dash_file *files;
 };