有一个skipper function，你可以用它来检查要跳过的路由。

JWTConfig struct {
  // Skipper defines a function to skip middleware.
  Skipper Skipper
  ... 
}

检查示例：

e.Use(middleware.JWTWithConfig(middleware.JWTConfig{
    SigningKey:  []byte(os.Getenv("Signing_Key")),
    TokenLookup: "header:x-auth-token",
    Skipper: func(c echo.Context) bool {
       // Skip middleware if path is equal 'login'
       if c.Request().URL.Path == "/login" {
         return true
       }
       return false
    },
}))

可能是这样的

e.Use(middleware.JWTWithConfig(middleware.JWTConfig{
    SigningKey:  []byte(os.Getenv("Signing_Key")),
    TokenLookup: "header:x-auth-token",
    Skipper: func(c echo.Context) bool {
       return c.Request().URL.Path == "/login"
    }
}))