diff --git a/.env.dev b/.env.dev
index 08457d1..5fbcbfc 100644
--- a/.env.dev
+++ b/.env.dev
@@ -17,3 +17,6 @@ USER_PAGES_BASE_URL=https://poisson.phc.dm.unipi.it/~
 
 # AuthService
 AUTH_SERVICE_HOST=:memory:
+
+# Origine per Lista Utenti
+LISTA_UTENTI=utenti-poisson-2022.local.json
\ No newline at end of file
diff --git a/_views/utenti.html b/_views/utenti.html
index dbb1ec0..a56aba3 100644
--- a/_views/utenti.html
+++ b/_views/utenti.html
@@ -41,7 +41,7 @@
                         entry.item.cognome + ' ' + entry.item.nome : 
                         entry.item.nome + ' ' + entry.item.cognome
                 "></a>
-                <template x-if="entry.item.macchinista">
+                <template x-if="entry.item.tags?.includes('macchinista')">
                     <div class="icon" title="Macchinista">
                         <i class="fas fa-wrench"></i>
                     </div>
diff --git a/auth/auth.go b/auth/auth.go
index edee71a..66ad471 100644
--- a/auth/auth.go
+++ b/auth/auth.go
@@ -48,5 +48,5 @@ func NewDefaultService(host string) Service {
 		return exampleMemoryUsers
 	}
 
-	return &LDAPAuthService{host}
+	return newLDAPAuthService(host)
 }
diff --git a/auth/ldap.go b/auth/ldap.go
index 7678a1a..9b7e8ea 100644
--- a/auth/ldap.go
+++ b/auth/ldap.go
@@ -33,17 +33,17 @@ func (u ldapUser) AsUser() *model.User {
 	}
 }
 
-// LDAPAuthService just holds the remote host of the HTTP LDAP service to make requests to
-type LDAPAuthService struct {
+// ldapAuthService just holds the remote host of the HTTP LDAP service to make requests to
+type ldapAuthService struct {
 	Host string
 }
 
-func NewLDAPAuthService(host string) Service {
-	return &LDAPAuthService{host}
+func newLDAPAuthService(host string) Service {
+	return &ldapAuthService{host}
 }
 
 // doGetRequest is a utility to make HTTP GET requests
-func (a *LDAPAuthService) doGetRequest(url string, response interface{}) error {
+func (a *ldapAuthService) doGetRequest(url string, response interface{}) error {
 	req, err := http.NewRequest(
 		"GET", path.Join(a.Host, "poisson-ldap", url), bytes.NewBuffer([]byte("")),
 	)
@@ -68,7 +68,7 @@ func (a *LDAPAuthService) doGetRequest(url string, response interface{}) error {
 }
 
 // doPostRequest is a utility to make HTTP POST requests
-func (a *LDAPAuthService) doPostRequest(url string, request interface{}, response interface{}) error {
+func (a *ldapAuthService) doPostRequest(url string, request interface{}, response interface{}) error {
 	jsonStr, err := json.Marshal(request)
 	if err != nil {
 		return err
@@ -89,7 +89,7 @@ func (a *LDAPAuthService) doPostRequest(url string, request interface{}, respons
 	return json.NewDecoder(res.Body).Decode(response)
 }
 
-func (a *LDAPAuthService) GetUser(username string) (*model.User, error) {
+func (a *ldapAuthService) GetUser(username string) (*model.User, error) {
 	var user ldapUser
 	if err := a.doGetRequest(fmt.Sprintf("/user/%s", username), &user); err != nil {
 		return nil, err
@@ -98,7 +98,7 @@ func (a *LDAPAuthService) GetUser(username string) (*model.User, error) {
 	return user.AsUser(), nil
 }
 
-func (a *LDAPAuthService) GetUsers() ([]*model.User, error) {
+func (a *ldapAuthService) GetUsers() ([]*model.User, error) {
 	ldapUsers := []*ldapUser{}
 	if err := a.doGetRequest("/users", &ldapUsers); err != nil {
 		return nil, err
@@ -112,7 +112,7 @@ func (a *LDAPAuthService) GetUsers() ([]*model.User, error) {
 	return users, nil
 }
 
-func (a *LDAPAuthService) GetSession(token string) (*model.Session, error) {
+func (a *ldapAuthService) GetSession(token string) (*model.Session, error) {
 	var response model.Session
 	if err := a.doGetRequest(fmt.Sprintf("/session/%s", token), &response); err != nil {
 		return nil, err
@@ -121,7 +121,7 @@ func (a *LDAPAuthService) GetSession(token string) (*model.Session, error) {
 	return &response, nil
 }
 
-func (a *LDAPAuthService) Login(username, password string) (*model.Session, error) {
+func (a *ldapAuthService) Login(username, password string) (*model.Session, error) {
 	reqBody := map[string]interface{}{
 		"username": username,
 		"password": password,
diff --git a/cmd/phc-website-server/main.go b/cmd/phc-website-server/main.go
index 101707e..a11ec27 100644
--- a/cmd/phc-website-server/main.go
+++ b/cmd/phc-website-server/main.go
@@ -7,6 +7,7 @@ import (
 	"git.phc.dm.unipi.it/phc/website/auth"
 	"git.phc.dm.unipi.it/phc/website/config"
 	"git.phc.dm.unipi.it/phc/website/handler"
+	"git.phc.dm.unipi.it/phc/website/lista_utenti"
 	"git.phc.dm.unipi.it/phc/website/server"
 	"git.phc.dm.unipi.it/phc/website/storia"
 	"git.phc.dm.unipi.it/phc/website/templates"
@@ -15,8 +16,15 @@ import (
 func main() {
 	config.Load()
 
+	authService := auth.NewDefaultService(config.AuthServiceHost)
+
+	listaUtentiService, err := lista_utenti.New(authService, config.ListaUtenti)
+	if err != nil {
+		log.Fatal(err)
+	}
+
 	h := &handler.DefaultHandler{
-		AuthService: auth.NewDefaultService(config.AuthServiceHost),
+		AuthService: authService,
 		Renderer: templates.NewRenderer(
 			"./_views/",
 			"./_views/base.html",
@@ -24,20 +32,16 @@ func main() {
 		),
 		NewsArticlesRegistry:  articles.NewRegistry("./_content/news"),
 		GuideArticlesRegistry: articles.NewRegistry("./_content/guide"),
-		// ListaUtenti: &website.JsonFileListaUtenti{
-		// Path: "./utenti-poisson-2022.local.json",
-		// },
-		ListaUtentiService: auth.NewLDAPAuthService(config.AuthServiceHost),
 		Storia: &storia.JsonFileStoria{
 			Path: "./storia.json",
 		},
+		ListaUtenti: listaUtentiService,
 	}
 
 	app := server.NewFiberServer(h)
 
 	log.Printf("Starting server on host %q", config.Host)
-	err := app.Listen(config.Host)
-	if err != nil {
+	if err := app.Listen(config.Host); err != nil {
 		log.Fatal(err)
 	}
 }
diff --git a/config/config.go b/config/config.go
index 30556a7..00d1d82 100644
--- a/config/config.go
+++ b/config/config.go
@@ -22,6 +22,9 @@ var UserPagesBaseUrl string
 
 var AuthServiceHost string
 
+// ListaUtenti è un file json da cui leggere la lista degli utenti oppure ":auth:" per utilizzare il servizio di autenticazione
+var ListaUtenti string
+
 func loadEnv(target *string, name, defaultValue string) {
 	value := os.Getenv(name)
 	if len(strings.TrimSpace(value)) == 0 {
@@ -43,20 +46,21 @@ func Load() {
 	// Production
 	loadEnv(&Mode, "MODE", "production")
 	loadEnv(&Host, "HOST", ":8080")
+	loadEnv(&BaseUrl, "BASE_URL", "localhost:8080")
 
 	// Services
 	loadEnv(&GitUrl, "GIT_URL", "https://git.example.org")
 	loadEnv(&ChatUrl, "CHAT_URL", "https://chat.example.org")
 	loadEnv(&Email, "EMAIL", "mail@example.org")
 
-	// Base URL
-	loadEnv(&BaseUrl, "BASE_URL", "localhost:8080")
-
 	// Poisson
 	loadEnv(&UserPagesBaseUrl, "USER_PAGES_BASE_URL", "https://poisson.phc.dm.unipi.it/~")
 
-	// AuthService
+	// Auth
 	loadEnv(&AuthServiceHost, "AUTH_SERVICE_HOST", "http://localhost:3535")
+
+	// Altro
+	loadEnv(&ListaUtenti, "LISTA_UTENTI", ":auth:")
 }
 
 func Object() util.Map {
@@ -73,5 +77,7 @@ func Object() util.Map {
 		"UserPagesBaseUrl": UserPagesBaseUrl,
 
 		"AuthServiceHost": AuthServiceHost,
+
+		"ListaUtenti": ListaUtenti,
 	}
 }
diff --git a/go.mod b/go.mod
index d9eaaba..51891f2 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module git.phc.dm.unipi.it/phc/website
 
-go 1.18
+go 1.19
 
 require (
 	github.com/alecthomas/chroma v0.9.4
diff --git a/handler/handler.go b/handler/handler.go
index 34aab02..be8109d 100644
--- a/handler/handler.go
+++ b/handler/handler.go
@@ -7,6 +7,7 @@ import (
 
 	"git.phc.dm.unipi.it/phc/website/articles"
 	"git.phc.dm.unipi.it/phc/website/auth"
+	"git.phc.dm.unipi.it/phc/website/lista_utenti"
 	"git.phc.dm.unipi.it/phc/website/model"
 	"git.phc.dm.unipi.it/phc/website/rss"
 	"git.phc.dm.unipi.it/phc/website/storia"
@@ -17,7 +18,7 @@ import (
 type Service interface {
 	HandleStaticPage(w io.Writer, view string, ctx Context) error
 	HandleUtenti() ([]*model.User, error)
-	HandleListaUtenti() ([]*model.User, error)
+	HandleListaUtenti() ([]*model.ListUser, error)
 	HandleStoriaPage(w io.Writer, ctx Context) error
 	HandleQueryAppunti(w io.Writer, query string, ctx Context) error
 	HandleAppuntiCondivisiPage(w io.Writer, ctx Context) error
@@ -50,7 +51,7 @@ type DefaultHandler struct {
 	Renderer              *templates.TemplateRenderer
 	NewsArticlesRegistry  *articles.Registry
 	GuideArticlesRegistry *articles.Registry
-	ListaUtentiService    auth.Service
+	ListaUtenti           lista_utenti.Service
 	Storia                storia.StoriaService
 }
 
@@ -69,8 +70,8 @@ func (h *DefaultHandler) HandleUtenti() ([]*model.User, error) {
 	return utenti, nil
 }
 
-func (h *DefaultHandler) HandleListaUtenti() ([]*model.User, error) {
-	utenti, err := h.ListaUtentiService.GetUsers()
+func (h *DefaultHandler) HandleListaUtenti() ([]*model.ListUser, error) {
+	utenti, err := h.ListaUtenti.GetUtenti()
 	if err != nil {
 		return nil, err
 	}
diff --git a/lista_utenti/auth.go b/lista_utenti/auth.go
new file mode 100644
index 0000000..d6ca4da
--- /dev/null
+++ b/lista_utenti/auth.go
@@ -0,0 +1,43 @@
+package lista_utenti
+
+import (
+	"git.phc.dm.unipi.it/phc/website/auth"
+	"git.phc.dm.unipi.it/phc/website/model"
+	"git.phc.dm.unipi.it/phc/website/util"
+)
+
+type authListaUtenti struct {
+	AuthService auth.Service
+
+	Macchinisti util.Set[string]
+}
+
+func newAuthListaUtenti(authService auth.Service) (Service, error) {
+	macchinisti, err := loadMacchinisti()
+	if err != nil {
+		return nil, err
+	}
+
+	return &authListaUtenti{authService, macchinisti}, nil
+}
+
+func (a *authListaUtenti) GetUtenti() ([]*model.ListUser, error) {
+	authUsers, err := a.AuthService.GetUsers()
+	if err != nil {
+		return nil, err
+	}
+
+	users := make([]*model.ListUser, 0, len(authUsers))
+	for _, u := range authUsers {
+		users = append(users, &model.ListUser{
+			Uid:     u.Username,
+			Nome:    u.Name,
+			Cognome: u.Surname,
+			Tags:    []string{},
+		})
+	}
+
+	mergeMacchinisti(users, a.Macchinisti)
+
+	return users, nil
+}
diff --git a/lista_utenti/json.go b/lista_utenti/json.go
new file mode 100644
index 0000000..e233806
--- /dev/null
+++ b/lista_utenti/json.go
@@ -0,0 +1,44 @@
+package lista_utenti
+
+import (
+	"encoding/json"
+	"log"
+	"os"
+
+	"git.phc.dm.unipi.it/phc/website/model"
+	"git.phc.dm.unipi.it/phc/website/util"
+)
+
+type jsonListaUtenti struct {
+	Path string
+
+	Macchinisti util.Set[string]
+}
+
+func newJsonListaUtenti(path string) (Service, error) {
+	macchinisti, err := loadMacchinisti()
+	if err != nil {
+		return nil, err
+	}
+
+	return &jsonListaUtenti{path, macchinisti}, nil
+}
+
+func (j *jsonListaUtenti) GetUtenti() ([]*model.ListUser, error) {
+	var users []*model.ListUser
+
+	f, err := os.Open(j.Path)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := json.NewDecoder(f).Decode(&users); err != nil {
+		return nil, err
+	}
+
+	mergeMacchinisti(users, j.Macchinisti)
+
+	log.Printf("Caricata lista di %d utenti", len(users))
+
+	return users, nil
+}
diff --git a/lista_utenti/lista_utenti.go b/lista_utenti/lista_utenti.go
new file mode 100644
index 0000000..94deab9
--- /dev/null
+++ b/lista_utenti/lista_utenti.go
@@ -0,0 +1,46 @@
+package lista_utenti
+
+import (
+	"encoding/json"
+	"os"
+
+	"git.phc.dm.unipi.it/phc/website/auth"
+	"git.phc.dm.unipi.it/phc/website/model"
+	"git.phc.dm.unipi.it/phc/website/util"
+)
+
+type Service interface {
+	GetUtenti() ([]*model.ListUser, error)
+}
+
+// New crea un nuovo servizio che lista gli utenti utilizzando AuthService se config è ":auth:" oppure un file json
+func New(authService auth.Service, config string) (Service, error) {
+	if config == ":auth:" {
+		return newAuthListaUtenti(authService)
+	}
+
+	return newJsonListaUtenti(config)
+}
+
+func loadMacchinisti() (util.Set[string], error) {
+	f, err := os.Open("macchinisti.json")
+	if err != nil {
+		return nil, err
+	}
+
+	macchinisti := []string{}
+
+	if err := json.NewDecoder(f).Decode(&macchinisti); err != nil {
+		return nil, err
+	}
+
+	return util.NewSet(macchinisti...), nil
+}
+
+func mergeMacchinisti(users []*model.ListUser, macchinisti util.Set[string]) {
+	for _, user := range users {
+		if _, found := macchinisti[user.Uid]; found {
+			user.Tags = append(user.Tags, "macchinista")
+		}
+	}
+}
diff --git a/macchinisti.json b/macchinisti.json
new file mode 100644
index 0000000..e1f9b6a
--- /dev/null
+++ b/macchinisti.json
@@ -0,0 +1 @@
+["delucreziis", "serdyuk", "minnocci", "manicastri"]
diff --git a/model/user.go b/model/user.go
index 8aee0fb..28bfd33 100644
--- a/model/user.go
+++ b/model/user.go
@@ -1,5 +1,12 @@
 package model
 
+type ListUser struct {
+	Uid     string   `json:"uid"`
+	Nome    string   `json:"nome"`
+	Cognome string   `json:"cognome"`
+	Tags    []string `json:"tags,omitempty"`
+}
+
 // User represents a user returned from AuthenticatorService
 type User struct {
 	Username string `json:"username"`
diff --git a/util/set.go b/util/set.go
new file mode 100644
index 0000000..156df8c
--- /dev/null
+++ b/util/set.go
@@ -0,0 +1,26 @@
+package util
+
+type Set[T comparable] map[T]struct{}
+
+func NewSet[T comparable](elements ...T) Set[T] {
+	set := Set[T]{}
+
+	for _, e := range elements {
+		set[e] = struct{}{}
+	}
+
+	return set
+}
+
+func (set Set[T]) Add(value T) {
+	set[value] = struct{}{}
+}
+
+func (set Set[T]) Remove(value T) {
+	delete(set, value)
+}
+
+func (set Set[T]) Has(value T) bool {
+	_, found := set[value]
+	return found
+}