diff --git a/model/client.go b/model/client.go
new file mode 100644
index 0000000..ae7270e
--- /dev/null
+++ b/model/client.go
@@ -0,0 +1,8 @@
+package model
+
+import "mastodon"
+
+type Client struct {
+	*mastodon.Client
+	Session Session
+}
diff --git a/model/session.go b/model/session.go
index af9e9e2..42c0aff 100644
--- a/model/session.go
+++ b/model/session.go
@@ -9,9 +9,10 @@ var (
 )
 
 type Session struct {
-	ID             string `json:"id"`
-	InstanceDomain string `json:"instance_domain"`
-	AccessToken    string `json:"access_token"`
+	ID             string   `json:"id"`
+	InstanceDomain string   `json:"instance_domain"`
+	AccessToken    string   `json:"access_token"`
+	Settings       Settings `json:"settings"`
 }
 
 type SessionRepository interface {
diff --git a/model/settings.go b/model/settings.go
new file mode 100644
index 0000000..ad7ec0f
--- /dev/null
+++ b/model/settings.go
@@ -0,0 +1,4 @@
+package model
+
+type Settings struct {
+}
diff --git a/service/auth.go b/service/auth.go
index 3cdf357..0209273 100644
--- a/service/auth.go
+++ b/service/auth.go
@@ -31,7 +31,7 @@ func getSessionID(ctx context.Context) (sessionID string, err error) {
 	return sessionID, nil
 }
 
-func (s *authService) getClient(ctx context.Context) (c *mastodon.Client, err error) {
+func (s *authService) getClient(ctx context.Context) (c *model.Client, err error) {
 	sessionID, err := getSessionID(ctx)
 	if err != nil {
 		return nil, ErrInvalidSession
@@ -44,12 +44,13 @@ func (s *authService) getClient(ctx context.Context) (c *mastodon.Client, err er
 	if err != nil {
 		return
 	}
-	c = mastodon.NewClient(&mastodon.Config{
+	mc := mastodon.NewClient(&mastodon.Config{
 		Server:       client.InstanceURL,
 		ClientID:     client.ClientID,
 		ClientSecret: client.ClientSecret,
 		AccessToken:  session.AccessToken,
 	})
+	c = &model.Client{Client: mc}
 	return c, nil
 }
 
@@ -58,7 +59,7 @@ func (s *authService) GetAuthUrl(ctx context.Context, instance string) (
 	return s.Service.GetAuthUrl(ctx, instance)
 }
 
-func (s *authService) GetUserToken(ctx context.Context, sessionID string, c *mastodon.Client,
+func (s *authService) GetUserToken(ctx context.Context, sessionID string, c *model.Client,
 	code string) (token string, err error) {
 	sessionID, err = getSessionID(ctx)
 	if err != nil {
@@ -95,7 +96,7 @@ func (s *authService) ServeSigninPage(ctx context.Context, client io.Writer) (er
 }
 
 func (s *authService) ServeTimelinePage(ctx context.Context, client io.Writer,
-	c *mastodon.Client, maxID string, sinceID string, minID string) (err error) {
+	c *model.Client, maxID string, sinceID string, minID string) (err error) {
 	c, err = s.getClient(ctx)
 	if err != nil {
 		return
@@ -103,7 +104,7 @@ func (s *authService) ServeTimelinePage(ctx context.Context, client io.Writer,
 	return s.Service.ServeTimelinePage(ctx, client, c, maxID, sinceID, minID)
 }
 
-func (s *authService) ServeThreadPage(ctx context.Context, client io.Writer, c *mastodon.Client, id string, reply bool) (err error) {
+func (s *authService) ServeThreadPage(ctx context.Context, client io.Writer, c *model.Client, id string, reply bool) (err error) {
 	c, err = s.getClient(ctx)
 	if err != nil {
 		return
@@ -111,7 +112,7 @@ func (s *authService) ServeThreadPage(ctx context.Context, client io.Writer, c *
 	return s.Service.ServeThreadPage(ctx, client, c, id, reply)
 }
 
-func (s *authService) ServeNotificationPage(ctx context.Context, client io.Writer, c *mastodon.Client, maxID string, minID string) (err error) {
+func (s *authService) ServeNotificationPage(ctx context.Context, client io.Writer, c *model.Client, maxID string, minID string) (err error) {
 	c, err = s.getClient(ctx)
 	if err != nil {
 		return
@@ -119,7 +120,7 @@ func (s *authService) ServeNotificationPage(ctx context.Context, client io.Write
 	return s.Service.ServeNotificationPage(ctx, client, c, maxID, minID)
 }
 
-func (s *authService) ServeUserPage(ctx context.Context, client io.Writer, c *mastodon.Client, id string, maxID string, minID string) (err error) {
+func (s *authService) ServeUserPage(ctx context.Context, client io.Writer, c *model.Client, id string, maxID string, minID string) (err error) {
 	c, err = s.getClient(ctx)
 	if err != nil {
 		return
@@ -127,7 +128,7 @@ func (s *authService) ServeUserPage(ctx context.Context, client io.Writer, c *ma
 	return s.Service.ServeUserPage(ctx, client, c, id, maxID, minID)
 }
 
-func (s *authService) ServeAboutPage(ctx context.Context, client io.Writer, c *mastodon.Client) (err error) {
+func (s *authService) ServeAboutPage(ctx context.Context, client io.Writer, c *model.Client) (err error) {
 	c, err = s.getClient(ctx)
 	if err != nil {
 		return
@@ -135,7 +136,7 @@ func (s *authService) ServeAboutPage(ctx context.Context, client io.Writer, c *m
 	return s.Service.ServeAboutPage(ctx, client, c)
 }
 
-func (s *authService) Like(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (s *authService) Like(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	c, err = s.getClient(ctx)
 	if err != nil {
 		return
@@ -143,7 +144,7 @@ func (s *authService) Like(ctx context.Context, client io.Writer, c *mastodon.Cl
 	return s.Service.Like(ctx, client, c, id)
 }
 
-func (s *authService) UnLike(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (s *authService) UnLike(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	c, err = s.getClient(ctx)
 	if err != nil {
 		return
@@ -151,7 +152,7 @@ func (s *authService) UnLike(ctx context.Context, client io.Writer, c *mastodon.
 	return s.Service.UnLike(ctx, client, c, id)
 }
 
-func (s *authService) Retweet(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (s *authService) Retweet(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	c, err = s.getClient(ctx)
 	if err != nil {
 		return
@@ -159,7 +160,7 @@ func (s *authService) Retweet(ctx context.Context, client io.Writer, c *mastodon
 	return s.Service.Retweet(ctx, client, c, id)
 }
 
-func (s *authService) UnRetweet(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (s *authService) UnRetweet(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	c, err = s.getClient(ctx)
 	if err != nil {
 		return
@@ -167,7 +168,7 @@ func (s *authService) UnRetweet(ctx context.Context, client io.Writer, c *mastod
 	return s.Service.UnRetweet(ctx, client, c, id)
 }
 
-func (s *authService) PostTweet(ctx context.Context, client io.Writer, c *mastodon.Client, content string, replyToID string, files []*multipart.FileHeader) (id string, err error) {
+func (s *authService) PostTweet(ctx context.Context, client io.Writer, c *model.Client, content string, replyToID string, files []*multipart.FileHeader) (id string, err error) {
 	c, err = s.getClient(ctx)
 	if err != nil {
 		return
@@ -175,7 +176,7 @@ func (s *authService) PostTweet(ctx context.Context, client io.Writer, c *mastod
 	return s.Service.PostTweet(ctx, client, c, content, replyToID, files)
 }
 
-func (s *authService) Follow(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (s *authService) Follow(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	c, err = s.getClient(ctx)
 	if err != nil {
 		return
@@ -183,7 +184,7 @@ func (s *authService) Follow(ctx context.Context, client io.Writer, c *mastodon.
 	return s.Service.Follow(ctx, client, c, id)
 }
 
-func (s *authService) UnFollow(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (s *authService) UnFollow(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	c, err = s.getClient(ctx)
 	if err != nil {
 		return
diff --git a/service/logging.go b/service/logging.go
index e0d47ed..f34bef5 100644
--- a/service/logging.go
+++ b/service/logging.go
@@ -4,9 +4,9 @@ import (
 	"context"
 	"io"
 	"log"
-	"mastodon"
 	"mime/multipart"
 	"time"
+	"web/model"
 )
 
 type loggingService struct {
@@ -27,7 +27,7 @@ func (s *loggingService) GetAuthUrl(ctx context.Context, instance string) (
 	return s.Service.GetAuthUrl(ctx, instance)
 }
 
-func (s *loggingService) GetUserToken(ctx context.Context, sessionID string, c *mastodon.Client,
+func (s *loggingService) GetUserToken(ctx context.Context, sessionID string, c *model.Client,
 	code string) (token string, err error) {
 	defer func(begin time.Time) {
 		s.logger.Printf("method=%v, session_id=%v, code=%v, took=%v, err=%v\n",
@@ -61,7 +61,7 @@ func (s *loggingService) ServeSigninPage(ctx context.Context, client io.Writer)
 }
 
 func (s *loggingService) ServeTimelinePage(ctx context.Context, client io.Writer,
-	c *mastodon.Client, maxID string, sinceID string, minID string) (err error) {
+	c *model.Client, maxID string, sinceID string, minID string) (err error) {
 	defer func(begin time.Time) {
 		s.logger.Printf("method=%v, max_id=%v, since_id=%v, min_id=%v, took=%v, err=%v\n",
 			"ServeTimelinePage", maxID, sinceID, minID, time.Since(begin), err)
@@ -69,7 +69,7 @@ func (s *loggingService) ServeTimelinePage(ctx context.Context, client io.Writer
 	return s.Service.ServeTimelinePage(ctx, client, c, maxID, sinceID, minID)
 }
 
-func (s *loggingService) ServeThreadPage(ctx context.Context, client io.Writer, c *mastodon.Client, id string, reply bool) (err error) {
+func (s *loggingService) ServeThreadPage(ctx context.Context, client io.Writer, c *model.Client, id string, reply bool) (err error) {
 	defer func(begin time.Time) {
 		s.logger.Printf("method=%v, id=%v, reply=%v, took=%v, err=%v\n",
 			"ServeThreadPage", id, reply, time.Since(begin), err)
@@ -77,7 +77,7 @@ func (s *loggingService) ServeThreadPage(ctx context.Context, client io.Writer,
 	return s.Service.ServeThreadPage(ctx, client, c, id, reply)
 }
 
-func (s *loggingService) ServeNotificationPage(ctx context.Context, client io.Writer, c *mastodon.Client, maxID string, minID string) (err error) {
+func (s *loggingService) ServeNotificationPage(ctx context.Context, client io.Writer, c *model.Client, maxID string, minID string) (err error) {
 	defer func(begin time.Time) {
 		s.logger.Printf("method=%v, max_id=%v, min_id=%v, took=%v, err=%v\n",
 			"ServeNotificationPage", maxID, minID, time.Since(begin), err)
@@ -85,7 +85,7 @@ func (s *loggingService) ServeNotificationPage(ctx context.Context, client io.Wr
 	return s.Service.ServeNotificationPage(ctx, client, c, maxID, minID)
 }
 
-func (s *loggingService) ServeUserPage(ctx context.Context, client io.Writer, c *mastodon.Client, id string, maxID string, minID string) (err error) {
+func (s *loggingService) ServeUserPage(ctx context.Context, client io.Writer, c *model.Client, id string, maxID string, minID string) (err error) {
 	defer func(begin time.Time) {
 		s.logger.Printf("method=%v, id=%v, max_id=%v, min_id=%v, took=%v, err=%v\n",
 			"ServeUserPage", id, maxID, minID, time.Since(begin), err)
@@ -93,7 +93,7 @@ func (s *loggingService) ServeUserPage(ctx context.Context, client io.Writer, c
 	return s.Service.ServeUserPage(ctx, client, c, id, maxID, minID)
 }
 
-func (s *loggingService) ServeAboutPage(ctx context.Context, client io.Writer, c *mastodon.Client) (err error) {
+func (s *loggingService) ServeAboutPage(ctx context.Context, client io.Writer, c *model.Client) (err error) {
 	defer func(begin time.Time) {
 		s.logger.Printf("method=%v, took=%v, err=%v\n",
 			"ServeAboutPage", time.Since(begin), err)
@@ -101,7 +101,7 @@ func (s *loggingService) ServeAboutPage(ctx context.Context, client io.Writer, c
 	return s.Service.ServeAboutPage(ctx, client, c)
 }
 
-func (s *loggingService) Like(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (s *loggingService) Like(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	defer func(begin time.Time) {
 		s.logger.Printf("method=%v, id=%v, took=%v, err=%v\n",
 			"Like", id, time.Since(begin), err)
@@ -109,7 +109,7 @@ func (s *loggingService) Like(ctx context.Context, client io.Writer, c *mastodon
 	return s.Service.Like(ctx, client, c, id)
 }
 
-func (s *loggingService) UnLike(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (s *loggingService) UnLike(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	defer func(begin time.Time) {
 		s.logger.Printf("method=%v, id=%v, took=%v, err=%v\n",
 			"UnLike", id, time.Since(begin), err)
@@ -117,7 +117,7 @@ func (s *loggingService) UnLike(ctx context.Context, client io.Writer, c *mastod
 	return s.Service.UnLike(ctx, client, c, id)
 }
 
-func (s *loggingService) Retweet(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (s *loggingService) Retweet(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	defer func(begin time.Time) {
 		s.logger.Printf("method=%v, id=%v, took=%v, err=%v\n",
 			"Retweet", id, time.Since(begin), err)
@@ -125,7 +125,7 @@ func (s *loggingService) Retweet(ctx context.Context, client io.Writer, c *masto
 	return s.Service.Retweet(ctx, client, c, id)
 }
 
-func (s *loggingService) UnRetweet(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (s *loggingService) UnRetweet(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	defer func(begin time.Time) {
 		s.logger.Printf("method=%v, id=%v, took=%v, err=%v\n",
 			"UnRetweet", id, time.Since(begin), err)
@@ -133,7 +133,7 @@ func (s *loggingService) UnRetweet(ctx context.Context, client io.Writer, c *mas
 	return s.Service.UnRetweet(ctx, client, c, id)
 }
 
-func (s *loggingService) PostTweet(ctx context.Context, client io.Writer, c *mastodon.Client, content string, replyToID string, files []*multipart.FileHeader) (id string, err error) {
+func (s *loggingService) PostTweet(ctx context.Context, client io.Writer, c *model.Client, content string, replyToID string, files []*multipart.FileHeader) (id string, err error) {
 	defer func(begin time.Time) {
 		s.logger.Printf("method=%v, content=%v, reply_to_id=%v, took=%v, err=%v\n",
 			"PostTweet", content, replyToID, time.Since(begin), err)
@@ -141,7 +141,7 @@ func (s *loggingService) PostTweet(ctx context.Context, client io.Writer, c *mas
 	return s.Service.PostTweet(ctx, client, c, content, replyToID, files)
 }
 
-func (s *loggingService) Follow(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (s *loggingService) Follow(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	defer func(begin time.Time) {
 		s.logger.Printf("method=%v, id=%v, took=%v, err=%v\n",
 			"Follow", id, time.Since(begin), err)
@@ -149,7 +149,7 @@ func (s *loggingService) Follow(ctx context.Context, client io.Writer, c *mastod
 	return s.Service.Follow(ctx, client, c, id)
 }
 
-func (s *loggingService) UnFollow(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (s *loggingService) UnFollow(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	defer func(begin time.Time) {
 		s.logger.Printf("method=%v, id=%v, took=%v, err=%v\n",
 			"UnFollow", id, time.Since(begin), err)
diff --git a/service/service.go b/service/service.go
index db7a1d7..d844a6f 100644
--- a/service/service.go
+++ b/service/service.go
@@ -26,21 +26,21 @@ var (
 type Service interface {
 	ServeHomePage(ctx context.Context, client io.Writer) (err error)
 	GetAuthUrl(ctx context.Context, instance string) (url string, sessionID string, err error)
-	GetUserToken(ctx context.Context, sessionID string, c *mastodon.Client, token string) (accessToken string, err error)
+	GetUserToken(ctx context.Context, sessionID string, c *model.Client, token string) (accessToken string, err error)
 	ServeErrorPage(ctx context.Context, client io.Writer, err error)
 	ServeSigninPage(ctx context.Context, client io.Writer) (err error)
-	ServeTimelinePage(ctx context.Context, client io.Writer, c *mastodon.Client, maxID string, sinceID string, minID string) (err error)
-	ServeThreadPage(ctx context.Context, client io.Writer, c *mastodon.Client, id string, reply bool) (err error)
-	ServeNotificationPage(ctx context.Context, client io.Writer, c *mastodon.Client, maxID string, minID string) (err error)
-	ServeUserPage(ctx context.Context, client io.Writer, c *mastodon.Client, id string, maxID string, minID string) (err error)
-	ServeAboutPage(ctx context.Context, client io.Writer, c *mastodon.Client) (err error)
-	Like(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error)
-	UnLike(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error)
-	Retweet(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error)
-	UnRetweet(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error)
-	PostTweet(ctx context.Context, client io.Writer, c *mastodon.Client, content string, replyToID string, files []*multipart.FileHeader) (id string, err error)
-	Follow(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error)
-	UnFollow(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error)
+	ServeTimelinePage(ctx context.Context, client io.Writer, c *model.Client, maxID string, sinceID string, minID string) (err error)
+	ServeThreadPage(ctx context.Context, client io.Writer, c *model.Client, id string, reply bool) (err error)
+	ServeNotificationPage(ctx context.Context, client io.Writer, c *model.Client, maxID string, minID string) (err error)
+	ServeUserPage(ctx context.Context, client io.Writer, c *model.Client, id string, maxID string, minID string) (err error)
+	ServeAboutPage(ctx context.Context, client io.Writer, c *model.Client) (err error)
+	Like(ctx context.Context, client io.Writer, c *model.Client, id string) (err error)
+	UnLike(ctx context.Context, client io.Writer, c *model.Client, id string) (err error)
+	Retweet(ctx context.Context, client io.Writer, c *model.Client, id string) (err error)
+	UnRetweet(ctx context.Context, client io.Writer, c *model.Client, id string) (err error)
+	PostTweet(ctx context.Context, client io.Writer, c *model.Client, content string, replyToID string, files []*multipart.FileHeader) (id string, err error)
+	Follow(ctx context.Context, client io.Writer, c *model.Client, id string) (err error)
+	UnFollow(ctx context.Context, client io.Writer, c *model.Client, id string) (err error)
 }
 
 type service struct {
@@ -132,7 +132,7 @@ func (svc *service) GetAuthUrl(ctx context.Context, instance string) (
 	return
 }
 
-func (svc *service) GetUserToken(ctx context.Context, sessionID string, c *mastodon.Client,
+func (svc *service) GetUserToken(ctx context.Context, sessionID string, c *model.Client,
 	code string) (token string, err error) {
 	if len(code) < 1 {
 		err = ErrInvalidArgument
@@ -209,7 +209,7 @@ func (svc *service) ServeSigninPage(ctx context.Context, client io.Writer) (err
 }
 
 func (svc *service) ServeTimelinePage(ctx context.Context, client io.Writer,
-	c *mastodon.Client, maxID string, sinceID string, minID string) (err error) {
+	c *model.Client, maxID string, sinceID string, minID string) (err error) {
 
 	var hasNext, hasPrev bool
 	var nextLink, prevLink string
@@ -265,7 +265,7 @@ func (svc *service) ServeTimelinePage(ctx context.Context, client io.Writer,
 	return
 }
 
-func (svc *service) ServeThreadPage(ctx context.Context, client io.Writer, c *mastodon.Client, id string, reply bool) (err error) {
+func (svc *service) ServeThreadPage(ctx context.Context, client io.Writer, c *model.Client, id string, reply bool) (err error) {
 	status, err := c.GetStatus(ctx, id)
 	if err != nil {
 		return
@@ -323,7 +323,7 @@ func (svc *service) ServeThreadPage(ctx context.Context, client io.Writer, c *ma
 	return
 }
 
-func (svc *service) ServeNotificationPage(ctx context.Context, client io.Writer, c *mastodon.Client, maxID string, minID string) (err error) {
+func (svc *service) ServeNotificationPage(ctx context.Context, client io.Writer, c *model.Client, maxID string, minID string) (err error) {
 	var hasNext bool
 	var nextLink string
 
@@ -377,7 +377,7 @@ func (svc *service) ServeNotificationPage(ctx context.Context, client io.Writer,
 	return
 }
 
-func (svc *service) ServeUserPage(ctx context.Context, client io.Writer, c *mastodon.Client, id string, maxID string, minID string) (err error) {
+func (svc *service) ServeUserPage(ctx context.Context, client io.Writer, c *model.Client, id string, maxID string, minID string) (err error) {
 	user, err := c.GetAccount(ctx, id)
 	if err != nil {
 		return
@@ -416,7 +416,7 @@ func (svc *service) ServeUserPage(ctx context.Context, client io.Writer, c *mast
 	return
 }
 
-func (svc *service) ServeAboutPage(ctx context.Context, client io.Writer, c *mastodon.Client) (err error) {
+func (svc *service) ServeAboutPage(ctx context.Context, client io.Writer, c *model.Client) (err error) {
 	navbarData, err := svc.getNavbarTemplateData(ctx, client, c)
 	if err != nil {
 		return
@@ -431,7 +431,7 @@ func (svc *service) ServeAboutPage(ctx context.Context, client io.Writer, c *mas
 	return
 }
 
-func (svc *service) getNavbarTemplateData(ctx context.Context, client io.Writer, c *mastodon.Client) (data *renderer.NavbarTemplateData, err error) {
+func (svc *service) getNavbarTemplateData(ctx context.Context, client io.Writer, c *model.Client) (data *renderer.NavbarTemplateData, err error) {
 	notifications, err := c.GetNotifications(ctx, nil)
 	if err != nil {
 		return
@@ -449,27 +449,27 @@ func (svc *service) getNavbarTemplateData(ctx context.Context, client io.Writer,
 	return
 }
 
-func (svc *service) Like(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (svc *service) Like(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	_, err = c.Favourite(ctx, id)
 	return
 }
 
-func (svc *service) UnLike(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (svc *service) UnLike(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	_, err = c.Unfavourite(ctx, id)
 	return
 }
 
-func (svc *service) Retweet(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (svc *service) Retweet(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	_, err = c.Reblog(ctx, id)
 	return
 }
 
-func (svc *service) UnRetweet(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (svc *service) UnRetweet(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	_, err = c.Unreblog(ctx, id)
 	return
 }
 
-func (svc *service) PostTweet(ctx context.Context, client io.Writer, c *mastodon.Client, content string, replyToID string, files []*multipart.FileHeader) (id string, err error) {
+func (svc *service) PostTweet(ctx context.Context, client io.Writer, c *model.Client, content string, replyToID string, files []*multipart.FileHeader) (id string, err error) {
 	var mediaIds []string
 	for _, f := range files {
 		a, err := c.UploadMediaFromMultipartFileHeader(ctx, f)
@@ -493,12 +493,12 @@ func (svc *service) PostTweet(ctx context.Context, client io.Writer, c *mastodon
 	return s.ID, nil
 }
 
-func (svc *service) Follow(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (svc *service) Follow(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	_, err = c.AccountFollow(ctx, id)
 	return
 }
 
-func (svc *service) UnFollow(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
+func (svc *service) UnFollow(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
 	_, err = c.AccountUnfollow(ctx, id)
 	return
 }
@@ -507,6 +507,7 @@ func addToReplyMap(m map[string][]mastodon.ReplyInfo, key interface{}, val strin
 	if key == nil {
 		return
 	}
+
 	keyStr, ok := key.(string)
 	if !ok {
 		return