Replace SessionStorage.java

src/main/java/inf226/inchat/SessionStorage.java

 package inf226.inchat;
 
-import java.sql.Connection;
-import java.sql.ResultSet;
-import java.sql.SQLException;
-import java.sql.Statement;
+import java.sql.*;
 import java.time.Instant;
 import java.util.UUID;
 
@@ -79,9 +76,11 @@ public final class SessionStorage
     public Stored<Session> get(UUID id)
       throws DeletedException,
              SQLException {
-        final String sql = "SELECT version,account,expiry FROM Session WHERE id = '" + id.toString() + "'";
-        final Statement statement = connection.createStatement();
-        final ResultSet rs = statement.executeQuery(sql);
+        final String sql =  id.toString();
+        final String query = "SELECT version,account,expiry FROM Session WHERE id = ? ";
+        final PreparedStatement statement = connection.prepareStatement(query);
+        statement.setString(1, sql);
+        final ResultSet rs = statement.executeQuery();
 
         if(rs.next()) {
             final UUID version = UUID.fromString(rs.getString("version"));