Add an option to use specific port for redirct uri under loopback scheme

[nicolasboattini]

Add an option to use specific port for redirct uri under loopback scheme

[elringus]

@nicolasboattini This is probably due to auth token not being cached or used. Try building the sample project and check if it reproduces for you to figure if that's related with your custom app or with the plugin. Feel free to open another issue to discuss this.

[nicolasboattini]

Searching a bit further i found this: https://github.com/elringus/unity-google-drive/blob/master/Assets/UnityGoogleDrive/Runtime/Authorization/LoopbackAccessTokenProvider.cs

where there is a method called ExecuteFullAuth() that implements this:
// Creates a redirect URI using an available port on the loopback address.
redirectUri = $"{settings.LoopbackUri}:{GetRandomUnusedPort()}";

I assume that here is where my problem resides cause its clearly using a random port. It really has to be like that? Isn't there a way to have a static port?

[elringus]

It has to be unused, but not necessarily random. The thing is, we do not know which port is unused on user machine. I guess there could be an option in config to use specific port instead of finding a random unused one.

[nicolasboattini]

Thanks for quick reply. I guess that having a field to use specific port set by the user could be a gamechanger enhancement nowadays. I'd like to do it myself but i'm afraid my knowledgements aren't that high, but i'll give it a try, if i find something i'll make a PR.

[nicolasboattini]

Done! Wasn't that hard i think.
Requesting for aproval here: #136

[nicolasboattini]

Nvm, it have a static port but the prompting for permissions stills appearing for every photo I try to upload. I don't know what else to do. Maybe it is some missing configuration in mi application in Google Cloud or maybe there is a way to set a default sign-in in the config and use that.