diff --git a/src/callers/common.rs b/src/callers/common.rs
new file mode 100644
index 0000000..c39654b
--- /dev/null
+++ b/src/callers/common.rs
@@ -0,0 +1,4 @@
+// basic handler that responds with a static string
+pub async fn root() -> &'static str {
+    "Hello, World!"
+}
diff --git a/src/callers/mod.rs b/src/callers/mod.rs
new file mode 100644
index 0000000..79b9089
--- /dev/null
+++ b/src/callers/mod.rs
@@ -0,0 +1,7 @@
+pub mod common;
+pub mod register;
+
+pub mod endpoints {
+    pub const ROOT: &str = "/";
+    pub const REGISTER: &str = "api/v2/register";
+}
diff --git a/src/callers/register.rs b/src/callers/register.rs
new file mode 100644
index 0000000..7a1299a
--- /dev/null
+++ b/src/callers/register.rs
@@ -0,0 +1,12 @@
+use axum::{Json, http::StatusCode};
+
+use crate::models;
+
+pub async fn register_user(
+    Json(payload): Json<models::common::CreateUser>,
+) -> (StatusCode, Json<models::common::User>) {
+    let user = models::common::User {
+        username: payload.username.clone(),
+    };
+    (StatusCode::CREATED, Json(user))
+}
diff --git a/src/config/mod.rs b/src/config/mod.rs
new file mode 100644
index 0000000..f34b535
--- /dev/null
+++ b/src/config/mod.rs
@@ -0,0 +1,10 @@
+pub fn get_full() -> String {
+    get_address() + ":" + &get_port()
+}
+fn get_address() -> String {
+    String::from("0.0.0.0")
+}
+
+fn get_port() -> String {
+    String::from("3000")
+}
diff --git a/src/main.rs b/src/main.rs
index 6a44cd6..a18c999 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,11 +1,11 @@
 use axum::{
-    // Json,
     Router,
-    // http::StatusCode,
-    routing::get,
-    // routing::{get, post},
+    routing::{get, post},
 };
-// use serde::{Deserialize, Serialize};
+
+pub mod callers;
+pub mod config;
+pub mod models;
 
 #[tokio::main]
 async fn main() {
@@ -14,28 +14,14 @@ async fn main() {
 
     // build our application with a route
     let app = Router::new()
-        // `GET /` goes to `root`
-        .route("/", get(root));
-    // `POST /users` goes to `create_user`
-    // .route("/users", post(create_user));
+        .route(callers::endpoints::ROOT, get(callers::common::root))
+        .route(
+            callers::endpoints::REGISTER,
+            post(callers::register::register_user),
+        );
 
     // run our app with hyper, listening globally on port 3000
-    let listener = tokio::net::TcpListener::bind(get_full()).await.unwrap();
+    let url = config::get_full();
+    let listener = tokio::net::TcpListener::bind(url).await.unwrap();
     axum::serve(listener, app).await.unwrap();
 }
-
-fn get_full() -> String {
-    get_address() + ":" + &get_port()
-}
-fn get_address() -> String {
-    String::from("0.0.0.0")
-}
-
-fn get_port() -> String {
-    String::from("3000")
-}
-
-// basic handler that responds with a static string
-async fn root() -> &'static str {
-    "Hello, World!"
-}
diff --git a/src/models/common.rs b/src/models/common.rs
new file mode 100644
index 0000000..cda15f2
--- /dev/null
+++ b/src/models/common.rs
@@ -0,0 +1,11 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Deserialize)]
+pub struct CreateUser {
+    pub username: String,
+}
+
+#[derive(Serialize)]
+pub struct User {
+    pub username: String,
+}
diff --git a/src/models/mod.rs b/src/models/mod.rs
new file mode 100644
index 0000000..34994bf
--- /dev/null
+++ b/src/models/mod.rs
@@ -0,0 +1 @@
+pub mod common;