diff -r 8f478162d991 -r 05c40b36d3b2 vendor/github.com/McKael/madon/v3/app.go
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/github.com/McKael/madon/v3/app.go	Sat Feb 04 12:58:35 2023 +0100
@@ -0,0 +1,99 @@
+/*
+Copyright 2017-2018 Mikael Berthe
+Copyright 2017 Ollivier Robert
+
+Licensed under the MIT license.  Please see the LICENSE file is this directory.
+*/
+
+package madon
+
+import (
+	"net/url"
+	"strings"
+
+	"github.com/pkg/errors"
+	"github.com/sendgrid/rest"
+)
+
+type registerApp struct {
+	ID           int64  `json:"id,string"`
+	ClientID     string `json:"client_id"`
+	ClientSecret string `json:"client_secret"`
+}
+
+// buildInstanceURL creates the URL from the instance name or cleans up the
+// provided URL
+func buildInstanceURL(instanceName string) (string, error) {
+	if instanceName == "" {
+		return "", errors.New("no instance provided")
+	}
+
+	instanceURL := instanceName
+	if !strings.Contains(instanceURL, "/") {
+		instanceURL = "https://" + instanceName
+	}
+
+	u, err := url.ParseRequestURI(instanceURL)
+	if err != nil {
+		return "", err
+	}
+
+	u.Path = ""
+	u.RawPath = ""
+	u.RawQuery = ""
+	u.Fragment = ""
+	return u.String(), nil
+}
+
+// NewApp registers a new application with a given instance
+func NewApp(name, website string, scopes []string, redirectURI, instanceName string) (mc *Client, err error) {
+	instanceURL, err := buildInstanceURL(instanceName)
+	if err != nil {
+		return nil, err
+	}
+
+	mc = &Client{
+		Name:        name,
+		InstanceURL: instanceURL,
+		APIBase:     instanceURL + currentAPIPath,
+	}
+
+	params := make(apiCallParams)
+	params["client_name"] = name
+	if website != "" {
+		params["website"] = website
+	}
+	params["scopes"] = strings.Join(scopes, " ")
+	if redirectURI != "" {
+		params["redirect_uris"] = redirectURI
+	} else {
+		params["redirect_uris"] = NoRedirect
+	}
+
+	var app registerApp
+	if err := mc.apiCall("v1/apps", rest.Post, params, nil, nil, &app); err != nil {
+		return nil, err
+	}
+
+	mc.ID = app.ClientID
+	mc.Secret = app.ClientSecret
+
+	return
+}
+
+// RestoreApp recreates an application client with existing secrets
+func RestoreApp(name, instanceName, appID, appSecret string, userToken *UserToken) (mc *Client, err error) {
+	instanceURL, err := buildInstanceURL(instanceName)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Client{
+		Name:        name,
+		InstanceURL: instanceURL,
+		APIBase:     instanceURL + currentAPIPath,
+		ID:          appID,
+		Secret:      appSecret,
+		UserToken:   userToken,
+	}, nil
+}