"Assets\CharacterController.cs(57,5): error CS1022: Type or namespace definition, or end-of-file expected" error

Hello, I have error:

Assets\CharacterController.cs(57,5): error CS1022: Type or namespace definition, or end-of-file expected

there is my script:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerController : MonoBehaviour
{
   {
    public CharacterController controller;
    public Transform playerCamera;


    public float speed = 6f;
    public float sprintSpeed = 10f;
    public float sensitivity = 2f;
    public float jumpHeight = 3f;

    private float rotationX = 0f;

    void Update()
    {
        // Player movement
        float horizontal = Input.GetAxis("Horizontal");
        float vertical = Input.GetAxis("Vertical");

        Vector3 direction = new Vector3(horizontal, 0f, vertical).normalized;
        Vector3 velocity = direction * speed;
		}
        // Sprinting
        if (Input.GetKey(KeyCode.LeftShift))
        {
            velocity = direction * sprintSpeed;
        }

        // Applying gravity
        if (!playerController.isGrounded)
        {
            velocity.y += Physics.gravity.y * Time.deltaTime;
        }

        playerController.Move(velocity * Time.deltaTime);

        // Player jumping
        if (Input.GetButtonDown("Jump") && playerController.isGrounded)
        {
            velocity.y = Mathf.Sqrt(jumpHeight * -2f * Physics.gravity.y);
        }

        // Player looking around
        float mouseX = Input.GetAxis("Mouse X") * sensitivity;
        float mouseY = Input.GetAxis("Mouse Y") * sensitivity;

        rotationX -= mouseY;
        rotationX = Mathf.Clamp(rotationX, -90f, 90f);

        playerCamera.transform.localRotation = Quaternion.Euler(rotationX, 0f, 0f);
        transform.Rotate(Vector3.up * mouseX);
    }
}

help me with it

Looks like you have two { brackets between the class declaration (public class <script name>) and the first variable (public CharacterController controller;) - You only need the first one.