api: Add go files

I know this is a huge commit, but I can't be bothered to check
this in part by part.

api/oauth.go

@@ -0,0 +1,11 @@
+package main
+
+import ()
+
+func oauthConfigure() error {
+	if err := googleOauthConfigure(); err != nil {
+		return err
+	}
+
+	return nil
+}