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try {
      const resRegister = await fetch(`${BASE_URL}/auth/register`, {
        method: "POST",
        headers: {
          "content-type": "application/json",
        },
        body: JSON.stringify(credentials),
      });
      const result = await resRegister.json();
      console.log(resRegister);
      if (!resRegister.ok) {
        alert(result.message);
      } else {
        dispatch({ type: "Register_success" }); 
        navigate("/login");
      }
    } catch (error) {
      alert(error.message);
    }
  };

//here is the config file already added
export const BASE_URL = "http://localhost:4000/api/v1";

我该怎么解决？