I have two private repositaries on Github, A and B. Both are Golang projects. Project A depends on repositary B. I have added both repositaries to Google Source Code. 

Now in Container builder, when I try to build for project A, it is not able to access repositary B. In the build logs, I see:

```
Step #1: [0;33m[WARN]  [mUnable to checkout github.com/avi/api

Step #1: [0;31m[ERROR] [mUpdate failed for github.com/avi/api: Unable to get repository

```

How do I debug/fix this?