Fixed name of the function to match design docs.

This is called there as Root Client Authorization Token (RCAT).

Change-Id: I906a6d887506369d3deb028636e2b630ef325b81
Reviewed-on: https://weave-review.googlesource.com/1884
Reviewed-by: Alex Vakulenko <avakulenko@google.com>
diff --git a/src/privet/auth_manager.cc b/src/privet/auth_manager.cc
index 49ef787..6a79b93 100644
--- a/src/privet/auth_manager.cc
+++ b/src/privet/auth_manager.cc
@@ -108,7 +108,7 @@
   return SplitTokenData(std::string(data.begin(), data.end()), time);
 }
 
-std::vector<uint8_t> AuthManager::GetRootDeviceToken() const {
+std::vector<uint8_t> AuthManager::GetRootClientAuthToken() const {
   Caveat scope{kUwMacaroonCaveatTypeScope, kUwMacaroonCaveatScopeTypeOwner};
   Caveat issued{kUwMacaroonCaveatTypeIssued,
                 static_cast<uint32_t>(Now().ToTimeT())};