Merge pull request #601 from firebase/rosalyntan.errorcode

Define new error codes for passthrough errors.

Author: rosalyntan

auth/src/android/common_android.cc

@@ -115,7 +115,11 @@ static const ErrorCodeMapping kFirebaseAuthCodes[] = {
     {"ERROR_UNSUPPORTED_FIRST_FACTOR", kAuthErrorUnsupportedFirstFactor},
     {"ERROR_EMAIL_CHANGE_NEEDS_VERIFICATION",
      kAuthErrorEmailChangeNeedsVerification},
-    {"ERROR_USER_CANCELLED", kAuthErrorMissingOrInvalidNonce},
+    {"ERROR_MISSING_OR_INVALID_NONCE", kAuthErrorMissingOrInvalidNonce},
+    {"ERROR_USER_CANCELLED", kAuthErrorUserCancelled},
+    {"ERROR_UNSUPPORTED_PASSTHROUGH_OPERATION",
+     kAuthErrorUnsupportedPassthroughOperation},
+    {"ERROR_TOKEN_REFRESH_UNAVAILABLE", kAuthErrorTokenRefreshUnavailable},
     {nullptr},
 };
 

auth/src/include/firebase/auth/types.h

@@ -419,6 +419,14 @@ enum AuthError {
   /// IDP sign-in.
   kAuthErrorUserCancelled,
 
+  /// Indicates that a request was made to an unsupported backend endpoint in
+  /// passthrough mode.
+  kAuthErrorUnsupportedPassthroughOperation,
+
+  /// Indicates that a token refresh was requested, but neither a refresh token
+  /// nor a custom token provider is available.
+  kAuthErrorTokenRefreshUnavailable,
+
 #endif  // INTERNAL_EXEPERIMENTAL
 };