Signing in problems across the school

I sign into my Wix account through Facebook that way all of my information automatically connected and it was and easy was to log in, however I have found a problem with this, on some computers across the school Facebook is blocked and so because of this I can not log in to my account this is something that I can now get around as in those lessons I can now use the app on my phone to upload new posts, another reason why the app is great.