diff --git a/examples/biome_oauth2.ts b/examples/biome_oauth2.ts
index ae1c790..1f32381 100644
--- a/examples/biome_oauth2.ts
+++ b/examples/biome_oauth2.ts
@@ -1,10 +1,11 @@
-import { oauth2_authorize, oauth2_token, oauth2_userinfo } from "../src";
+import { cas_login, cas_oauth2_authorize, cas_oauth2_token, cas_oauth2_userinfo } from "../src";
 import { credentials } from "./_credentials";
 
 void async function main () {
-  const code = await oauth2_authorize(credentials);
-  const { access_token } = await oauth2_token(code);
-  const { email, name, sub } = await oauth2_userinfo(access_token);
+  const cas_token = await cas_login(credentials.username, credentials.password);
+  const code = await cas_oauth2_authorize(cas_token);
+  const { access_token } = await cas_oauth2_token(code);
+  const { email, name, sub } = await cas_oauth2_userinfo(access_token);
 
   console.log("Logged to", sub, "with email", email, "and name", name);
 }();
diff --git a/examples/events_calendar_id.ts b/examples/events_calendar_id.ts
index 01f4f62..757ac11 100644
--- a/examples/events_calendar_id.ts
+++ b/examples/events_calendar_id.ts
@@ -1,11 +1,12 @@
-import { get_events_by_calendar_id, login_check, oauth2_authorize, oauth2_token } from "../src";
+import { cas_login, get_events_by_calendar_id, login_check, cas_oauth2_authorize, cas_oauth2_token } from "../src";
 import { credentials } from "./_credentials";
 
 const CALENDAR_ID = "";
 
 void async function main () {
-  const code = await oauth2_authorize(credentials);
-  const { access_token } = await oauth2_token(code);
+  const cas_token = await cas_login(credentials.username, credentials.password);
+  const code = await cas_oauth2_authorize(cas_token);
+  const { access_token } = await cas_oauth2_token(code);
   const { token } = await login_check(access_token);
 
   const events = await get_events_by_calendar_id(token, {
diff --git a/examples/external_service_ticket.ts b/examples/external_service_ticket.ts
new file mode 100644
index 0000000..31810e4
--- /dev/null
+++ b/examples/external_service_ticket.ts
@@ -0,0 +1,18 @@
+import { credentials } from "./_credentials";
+import { cas_login, cas_service, CAS_EXTERNAL_SERVICES } from "../src";
+
+/**
+ * In this example, we'll see how we can get a ticket for an external service.
+ * An external service is like a Moodle instance, a calendar, or a forum.
+ *
+ * We'll use the CAS to get those tickets.
+ */
+void async function main () {
+  // 1. get an authenticated token from the CAS.
+  const cas_token = await cas_login(credentials.username, credentials.password);
+
+  // 2. let's get a ticket for any service inside "CAS_EXTERNAL_SERVICES" constant.
+  const iut_moodle_ticket = await cas_service(cas_token, CAS_EXTERNAL_SERVICES.IUT_COMMUNITY_MOODLE);
+  console.log(iut_moodle_ticket);
+}();
+
diff --git a/examples/moodle.ts b/examples/moodle.ts
index bb0a63c..3d15f85 100644
--- a/examples/moodle.ts
+++ b/examples/moodle.ts
@@ -1,11 +1,13 @@
-import { get_moodle_courses, login_check, oauth2_authorize, oauth2_token } from "../src";
+import { cas_login, get_moodle_courses, login_check, cas_oauth2_authorize, cas_oauth2_token } from "../src";
 import { credentials } from "./_credentials";
 
 void async function main () {
-  const code = await oauth2_authorize(credentials);
-  const { access_token } = await oauth2_token(code);
+  const cas_token = await cas_login(credentials.username, credentials.password);
+  const code = await cas_oauth2_authorize(cas_token);
+  const { access_token } = await cas_oauth2_token(code);
   const { token } = await login_check(access_token);
 
+  // Get Moodle courses from Biome API.
   const courses = await get_moodle_courses(token, true);
   console.log(courses);
 }();
diff --git a/examples/preferences.ts b/examples/preferences.ts
index e05199f..18e8f73 100644
--- a/examples/preferences.ts
+++ b/examples/preferences.ts
@@ -1,9 +1,10 @@
-import { login_check, oauth2_authorize, oauth2_token, preferences_by_properties } from "../src";
+import { cas_login, login_check, cas_oauth2_authorize, cas_oauth2_token, preferences_by_properties } from "../src";
 import { credentials } from "./_credentials";
 
 void async function main () {
-  const code = await oauth2_authorize(credentials);
-  const { access_token } = await oauth2_token(code);
+  const cas_token = await cas_login(credentials.username, credentials.password);
+  const code = await cas_oauth2_authorize(cas_token);
+  const { access_token } = await cas_oauth2_token(code);
   const { token } = await login_check(access_token);
 
   const userApplications = await preferences_by_properties(token, "userApplications");
diff --git a/examples/subscribed.ts b/examples/subscribed.ts
index c1c9f0b..0260b07 100644
--- a/examples/subscribed.ts
+++ b/examples/subscribed.ts
@@ -1,9 +1,10 @@
-import { get_subscribed_by_username, login_check, oauth2_authorize, oauth2_token } from "../src";
+import { cas_login, get_subscribed_by_username, login_check, cas_oauth2_authorize, cas_oauth2_token } from "../src";
 import { credentials } from "./_credentials";
 
 void async function main () {
-  const code = await oauth2_authorize(credentials);
-  const { access_token } = await oauth2_token(code);
+  const cas_token = await cas_login(credentials.username, credentials.password);
+  const code = await cas_oauth2_authorize(cas_token);
+  const { access_token } = await cas_oauth2_token(code);
   const { token } = await login_check(access_token);
   const subscribed = await get_subscribed_by_username(token);
 
diff --git a/examples/user_profile.ts b/examples/user_profile.ts
index 38f9b45..a3969a6 100644
--- a/examples/user_profile.ts
+++ b/examples/user_profile.ts
@@ -1,9 +1,10 @@
-import { oauth2_authorize, oauth2_token, login_check, get_user_profile } from "../src";
+import { cas_oauth2_authorize, cas_oauth2_token, login_check, get_user_profile, cas_login } from "../src";
 import { credentials } from "./_credentials";
 
 void async function main () {
-  const code = await oauth2_authorize(credentials);
-  const { access_token } = await oauth2_token(code);
+  const cas_token = await cas_login(credentials.username, credentials.password);
+  const code = await cas_oauth2_authorize(cas_token);
+  const { access_token } = await cas_oauth2_token(code);
   const { token } = await login_check(access_token);
 
   const profile = await get_user_profile(token, credentials.username);