Add models based on Db tables

src/main/java/org/to/telegramfinalproject/Database/ConnectionDb.java

@@ -5,7 +5,7 @@ import java.sql.DriverManager;
 import java.sql.SQLException;
 
 public class ConnectionDb {
-    private static final String JDBC_URL = "jdbc:postgresql://localhost:5432/Telegramdb";
+    private static final String JDBC_URL = "jdbc:postgresql://localhost:5432/Telegram";
     private static final String USERNAME = "postgres";
     private static final String PASSWORD = "Partow@1384";