Use nullable types for UserMetadata fields

Author: hiranya911

CHANGELOG.md

@@ -1,8 +1,7 @@
 # Unreleased
 
-- [added] Implemented the `GetUserById()` API in the `FirebaseUserManager` class.
-
--
+- [added] Implemented the `GetUserAsync()` API in the `FirebaseAuth` class.
+- [added] Implemented the `DeleteUserAsync()` API in the `FirebaseAuth` class.
 
 # v1.4.0
 

FirebaseAdmin/FirebaseAdmin.Tests/Auth/FirebaseUserManagerTest.cs

@@ -58,8 +58,8 @@ public async Task GetUserById()
             Assert.Equal(UserRecord.UnixEpoch, userRecord.TokensValidAfterTimestamp);
             Assert.Empty(userRecord.CustomClaims);
             Assert.Empty(userRecord.ProviderData);
-            Assert.Equal(DateTime.MinValue, userRecord.UserMetaData.CreationTimestamp);
-            Assert.Equal(DateTime.MinValue, userRecord.UserMetaData.LastSignInTimestamp);
+            Assert.Null(userRecord.UserMetaData.CreationTimestamp);
+            Assert.Null(userRecord.UserMetaData.LastSignInTimestamp);
         }
 
         [Fact]

FirebaseAdmin/FirebaseAdmin.Tests/Auth/UserRecordTest.cs

@@ -64,8 +64,8 @@ public void UidOnly()
             Assert.Empty(user.CustomClaims);
             Assert.Empty(user.ProviderData);
             Assert.NotNull(user.UserMetaData);
-            Assert.Equal(DateTime.MinValue, user.UserMetaData.CreationTimestamp);
-            Assert.Equal(DateTime.MinValue, user.UserMetaData.LastSignInTimestamp);
+            Assert.Null(user.UserMetaData.CreationTimestamp);
+            Assert.Null(user.UserMetaData.LastSignInTimestamp);
         }
 
         [Fact]

FirebaseAdmin/FirebaseAdmin/Auth/UserMetadata.cs

@@ -26,27 +26,27 @@ internal UserMetadata(long creationTimestamp, long lastSignInTimestamp)
 
         /// <summary>
         /// Gets a timestamp representing the date and time that the account was created.
-        /// If not available this property is <c>DateTime.MinValue</c>.
+        /// If not available this property is <c>null</c>.
         /// </summary>
-        public DateTime CreationTimestamp
+        public DateTime? CreationTimestamp
         {
             get => this.ToDateTime(this.creationTimestampMillis);
         }
 
         /// <summary>
         /// Gets a timestamp representing the last time that the user has signed in. If the user
-        /// has never signed in this property is <c>DateTime.MinValue</c>.
+        /// has never signed in this property is <c>null</c>.
         /// </summary>
-        public DateTime LastSignInTimestamp
+        public DateTime? LastSignInTimestamp
         {
             get => this.ToDateTime(this.lastSignInTimestampMillis);
         }
 
-        private DateTime ToDateTime(long millisFromEpoch)
+        private DateTime? ToDateTime(long millisFromEpoch)
         {
             if (millisFromEpoch == 0)
             {
-                return DateTime.MinValue;
+                return null;
             }
 
             return UserRecord.UnixEpoch.AddMilliseconds(millisFromEpoch);