User authentication is functional

Controllers/PasswordVerification.cs

@@ -47,6 +47,7 @@ public class PasswordVerification
     public string HashPassword(User user, Salt salt, string password = "")
     {
         var hashAlgorithm = HashAlgorithmName.SHA512;
+        var dbHashedPassword = user.Password;
 
         if (!string.IsNullOrEmpty(password))
         {
@@ -60,6 +61,8 @@ public class PasswordVerification
             hashAlgorithm,
             this._keySize);
 
+        user.Password = dbHashedPassword;
+
         return Convert.ToHexString(hash);
     }
     #endregion

Repositories/BaseRepository.cs

@@ -4,8 +4,8 @@ using TextSender_API.Repositories;
 public class BaseRepository
 {
     #region Fields
-    protected string _connectionString;
+    protected string? _connectionString;
     protected string _databaseName = "textSender";
-    protected string _tableName;
+    protected string? _tableName;
     #endregion
 }