Document process to get a .netrc password

Change-Id: Ia777218b2c6454c6da5912f86776ef6ceb9dc2bb
diff --git a/src/source/ b/src/source/
index 72531c3..0ea530d 100644
--- a/src/source/
+++ b/src/source/
@@ -38,6 +38,18 @@
 # For contributors #
+## Authenticate with the server ##
+Before you can upload to Gerrit, you need to establish a password that
+will identify you with the server. You only need to do this once.
+- Sign in on the [AOSP Gerrit Server](
+- Go to Settings -> HTTP Password -> Obtain Password
+- Follow the instructions on the subsquent pages, and copy-paste your
+password in `~/.netrc`. If there are two password lines, copy both.
 ## Start a repo branch ##
 For each change you intend to make, start a new branch within the relevant git repository: