Using inline struct inside of function that returns http.HandlerFunc can't generate spec

[snowzach]

Environment

swagger version: 48f1315
go version: 1.14
OS: Linux

Testing this for generating swagger specs... I have this function that returns an HTTP handler:

// Login logs in a user
func (s *Server) Login() http.HandlerFunc {

	type loginRequest struct {
		Username string `json:"username"`
		Password string `json:"password"`
	}
	
	type loginResponse struct {
		Token string `json:"token"`
	}
	
	// This returns the JWT token used for Authorization: Bearer header
	// swagger:parameters login
	type SwaggerRequest struct {
		// The username and password payload
		// in: body
		// requred: true
		Payload *loginRequest
	}

	// Login Success
	// swagger:response loginResponse
	type SwaggerResponse struct {
		// The JWT token
		// in: body
		Payload *loginResponse
	}

	// swagger:route POST /api/login AUTH login
	// Login to system
	// responses:
	//   200: loginResponse "Success"
	return func(w http.ResponseWriter, r *http.Request) {
		// do login stuff
	}
}

When I try to generate the spec it shows:
unable to find package and source file for: github.com/reponame/package.passwordRequest

If I move the loginRequest and loginResponse structs outside of the Login() function it works. Is there any way to fix it to be able to see those struct in that scope? Is there a better way I should be defining this login function?