Created one part of all endpoints to admin the user

BeReadyBackend/Specifications/Users/GetUserByCriteriaSpec.cs

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+using Ardalis.Specification;
+using BeReadyBackend.Models;
+
+namespace BeReadyBackend.Specifications.Users;
+
+public class GetUserByCriteriaSpec : SingleResultSpecification<User>
+{
+    public GetUserByCriteriaSpec(string username, string email, int? id)
+    {
+        Query
+            .Where(x => (x.Username == username || x.Email == email) && x.Id != id);
+    }
+}

BeReadyBackend/Specifications/Users/GetUsersByScoreSpec.cs

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+using Ardalis.Specification;
+using BeReadyBackend.Models;
+
+namespace BeReadyBackend.Specifications.Users;
+
+public class GetUsersByScoreSpec : Specification<User>
+{
+    public GetUsersByScoreSpec()
+    {
+        Query
+            .OrderByDescending(x => x.Score);
+    }
+}