Update README.md

diff --git a/README.md b/README.md
index 916a317..ffb3aca 100644
--- a/README.md
+++ b/README.md
@@ -34,3 +34,11 @@ Todo
 #Gotta catch them all
 #Map Enums
 ```
+
+To use the google login:
+```
+Install charles and follow ios/android:
+https://www.charlesproxy.com/documentation/using-charles/ssl-certificates/
+
+Disable firewall and login to Pokemon Go on phone. Look for android.google.com request and fetch the headers from the android.google.com/auth request and put them in Settings.cs.
+```