@Summary Login user @Description Login user with username and password @Tags User @Accept json @Produce json @Param user body define.UserLoginReq true "User login details" @Success 200 {object} define.UserLoginRes @Failure 400 {object} gin.H @Failure 500 {object} gin.H.

@Summary Register a new user @Description Register a new user with username, password, and email @Tags User @Accept json @Produce json @Param user body define.UserRegisterReq true "User registration details" @Success 200 {object} define.UserRegisterRes @Failure 400 {object} gin.H @Failure 500 {object} gin.H.