Fix doc strings for bulk get/delete users (#186)

Author: rsgowman

FirebaseAdmin/FirebaseAdmin/Auth/DeleteUsersResult.cs

@@ -20,7 +20,7 @@ namespace FirebaseAdmin.Auth
 {
     /// <summary>
     /// Represents the result of the
-    /// <see cref="M:FirebaseAuth.DeleteUsersAsync(IReadOnlyList{String})"/> API.
+    /// <see cref="FirebaseAuth.DeleteUsersAsync(IReadOnlyList{string})"/> API.
     /// </summary>
     public sealed class DeleteUsersResult
     {
@@ -53,7 +53,7 @@ internal DeleteUsersResult(int users, BatchDeleteResponse response)
         /// <summary>
         /// Gets the number of users that were deleted successfully (possibly zero). Users that
         /// did not exist prior to calling
-        /// <see cref="M:FirebaseAuth.DeleteUsersAsync(IReadOnlyList{String})"/> are considered to
+        /// <see cref="FirebaseAuth.DeleteUsersAsync(IReadOnlyList{string})"/> are considered to
         /// be successfully deleted.
         /// </summary>
         public int SuccessCount { get; }

FirebaseAdmin/FirebaseAdmin/Auth/EmailIdentifier.cs

@@ -12,12 +12,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+using System.Collections.Generic;
+
 namespace FirebaseAdmin.Auth
 {
     /// <summary>
     /// Used for looking up an account by email.
     ///
-    /// See <see cref="M:FirebaseAuth.GetUsersAsync(IReadOnlyCollection{UserIdentifier})"/>.
+    /// See <see cref="FirebaseAuth.GetUsersAsync(IReadOnlyCollection{UserIdentifier})"/>.
     /// </summary>
     public sealed class EmailIdentifier : UserIdentifier
     {

FirebaseAdmin/FirebaseAdmin/Auth/ErrorInfo.cs

@@ -12,14 +12,16 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+using System.Collections.Generic;
+
 namespace FirebaseAdmin.Auth
 {
     // TODO(rsgowman): This class is expected to also be used for the
     // ImportUsersAsync() method... once that exists.
 
     /// <summary>
     /// Represents an error encountered while deleting users via the
-    /// <see cref="M:FirebaseAuth.DeleteUsersAsync(IReadOnlyList{String})"/> API.
+    /// <see cref="FirebaseAuth.DeleteUsersAsync(IReadOnlyList{string})"/> API.
     /// </summary>
     public sealed class ErrorInfo
     {
@@ -31,7 +33,7 @@ internal ErrorInfo(int index, string reason)
 
         /// <summary>
         /// Gets the index of the user that was unable to be deleted in the list passed to the
-        /// <see cref="M:FirebaseAuth.DeleteUsersAsync(IReadOnlyList{String})"/> method.
+        /// <see cref="FirebaseAuth.DeleteUsersAsync(IReadOnlyList{string})"/> method.
         /// </summary>
         public int Index { get; }
 

FirebaseAdmin/FirebaseAdmin/Auth/GetUsersResult.cs

@@ -18,7 +18,7 @@
 namespace FirebaseAdmin.Auth
 {
     /// <summary>
-    /// Represents the result of the <see cref="M:FirebaseAuth.GetUsersAsync(IReadOnlyCollection{UserIdentifier})"/> API.
+    /// Represents the result of the <see cref="FirebaseAuth.GetUsersAsync(IReadOnlyCollection{UserIdentifier})"/> API.
     /// </summary>
     public sealed class GetUsersResult
     {

FirebaseAdmin/FirebaseAdmin/Auth/PhoneIdentifier.cs

@@ -12,12 +12,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+using System.Collections.Generic;
+
 namespace FirebaseAdmin.Auth
 {
     /// <summary>
     /// Used for looking up an account by phone number.
     ///
-    /// See <see cref="M:FirebaseAuth.GetUsersAsync(IReadOnlyCollection{UserIdentifier})"/>.
+    /// See <see cref="FirebaseAuth.GetUsersAsync(IReadOnlyCollection{UserIdentifier})"/>.
     /// </summary>
     public sealed class PhoneIdentifier : UserIdentifier
     {

FirebaseAdmin/FirebaseAdmin/Auth/ProviderIdentifier.cs

@@ -12,14 +12,15 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+using System.Collections.Generic;
 using System.Linq;
 
 namespace FirebaseAdmin.Auth
 {
     /// <summary>
     /// Used for looking up an account by provider.
     ///
-    /// See <see cref="M:FirebaseAuth.GetUsersAsync(IReadOnlyCollection{UserIdentifier})"/>.
+    /// See <see cref="FirebaseAuth.GetUsersAsync(IReadOnlyCollection{UserIdentifier})"/>.
     /// </summary>
     public sealed class ProviderIdentifier : UserIdentifier
     {

FirebaseAdmin/FirebaseAdmin/Auth/UidIdentifier.cs

@@ -12,12 +12,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+using System.Collections.Generic;
+
 namespace FirebaseAdmin.Auth
 {
     /// <summary>
     /// Used for looking up an account by uid.
     ///
-    /// See <see cref="M:FirebaseAuth.GetUsersAsync(IReadOnlyCollection{UserIdentifier})"/>.
+    /// See <see cref="FirebaseAuth.GetUsersAsync(IReadOnlyCollection{UserIdentifier})"/>.
     /// </summary>
     public sealed class UidIdentifier : UserIdentifier
     {