Malformed Error Messages from GetUser APIs

[hiranya911]

This is an error message I received from a GetUserByEmail() call:

cannot find user from params: {0 [foo@bar.com]  [] [] [] []}

The SDK should do a better job at producing well-formed, developer-friendly error messages.

[google-oss-bot]

Hey there! I couldn't figure out what this issue is about, so I've labeled it for a human to triage. Hang tight.

[google-oss-bot]

Hmmm this issue does not seem to follow the issue template. Make sure you provide all the required information.

[hiranya911]

Fixed in #113