convert rest api POST request from json to form-data in golang gofiber framework

I have the following code that works for JSON in the body of the POST request but i now want to convert this to using form-data in the body of the request

Here is what i have

func Signin(c *fiber.Ctx) error {
	var data map[string]string

	if err := c.BodyParser(&data); err != nil {
		return err
	}

	var user models.User

    findUser := database.DB.Where("email = ?", data.email).First(&user)

	token, err := middlewares.GenerateJWT(user.Email)

	if err != nil {
		c.Status(fiber.StatusBadRequest)
		return c.JSON(fiber.Map{
			"message": "Invalid credentials",
		})	
	}

	cookie := fiber.Cookie{
		Name: "access_token",
		Value: token,
		Expires: time.Now().Add(time.Hour * 24),
		HTTPOnly: true,
		Secure:   true,
	}

	c.Cookie(&cookie)

	return c.JSON(fiber.Map{
		"access_token": token,
		"token_type": "bearer",
	})

}

above works fine for raw JSON body but i want to change to form-data body

I have tried many things including this but to no avail

func Signin(c *fiber.Ctx) error {

    type SigninData struct {
	    email  string `json:"email" xml:"email" form:"email"`
	    password string `json:"password" xml:"password" form:"password"`
    }

	data := new(SigninData)

	if err := c.BodyParser(&data); err != nil {
		return err
	}

	var user models.User

    findUser := database.DB.Where("email = ?", data.email).First(&user)

	token, err := middlewares.GenerateJWT(user.Email)

	if err != nil {
		c.Status(fiber.StatusBadRequest)
		return c.JSON(fiber.Map{
			"message": "Invalid credentials",
		})	
	}


	cookie := fiber.Cookie{
		Name: "access_token",
		Value: token,
		Expires: time.Now().Add(time.Hour * 24),
		HTTPOnly: true,
		Secure:   true,
	}

	c.Cookie(&cookie)

	return c.JSON(fiber.Map{
		"access_token": token,
		"token_type": "bearer",
	})

}

but i get the following error

schema: interface must be a pointer to struct

what am i missing that i need to fix to get this to accept form-data?

The method BodyParser expects a pointer to a struct as an argument, but your code is trying to pass it a pointer to a pointer to a struct. Please initialize the struct this way:

data := SigninData{}

Also, try to make the fields of the SigninData struct public:

type SigninData struct {
    Email  string `json:"email" xml:"email" form:"email"`
    Password string `json:"password" xml:"password" form:"password"`
}