fix(auth): adds missing EMAIL_NOT_FOUND error code (#298)

* fix(auth): adds missing EMAIL_NOT_FOUND error code

Catch EMAIL_NOT_FOUND when /accounts:sendOobCode is called for password reset on a user that does not exist.

Author: bojeil-google

FirebaseAdmin/FirebaseAdmin.Tests/Auth/AuthErrorHandlerTest.cs

@@ -57,6 +57,12 @@ public class AuthErrorHandlerTest
                     ErrorCode.NotFound,
                     AuthErrorCode.UserNotFound,
                 },
+                new object[]
+                {
+                    "EMAIL_NOT_FOUND",
+                    ErrorCode.NotFound,
+                    AuthErrorCode.EmailNotFound,
+                },
             };
 
         [Theory]

FirebaseAdmin/FirebaseAdmin/Auth/AuthErrorCode.cs

@@ -98,5 +98,12 @@ public enum AuthErrorCode
         /// Tenant ID in a token does not match.
         /// </summary>
         TenantIdMismatch,
+
+        /// <summary>
+        /// No user record found for the given email, typically raised when
+        /// generating a password reset link using an email for a user that
+        /// is not already registered.
+        /// </summary>
+        EmailNotFound,
     }
 }

FirebaseAdmin/FirebaseAdmin/Auth/AuthErrorHandler.cs

@@ -63,6 +63,13 @@ internal sealed class AuthErrorHandler
                         AuthErrorCode.EmailAlreadyExists,
                         "The user with the provided email already exists")
                 },
+                {
+                    "EMAIL_NOT_FOUND",
+                    new ErrorInfo(
+                        ErrorCode.NotFound,
+                        AuthErrorCode.EmailNotFound,
+                        "No user record found for the given email")
+                },
                 {
                     "INVALID_DYNAMIC_LINK_DOMAIN",
                     new ErrorInfo(