Fix typo.

Bug: 111601636
Test: manually
Change-Id: I12f15337ba99906322f596f39683c571ddc4747e
diff --git a/public/errors.py b/public/errors.py
index 64b0c7d..3091422 100755
--- a/public/errors.py
+++ b/public/errors.py
@@ -73,7 +73,7 @@
     """Raised when some retriable requests fail in a batch execution."""
 
 
-class AuthentcationError(DriverError):
+class AuthenticationError(DriverError):
     """Raised when authentication fails."""