diff --git a/src/backend/mod.rs b/src/backend/mod.rs
index 44fe39f..2d46af7 100644
--- a/src/backend/mod.rs
+++ b/src/backend/mod.rs
@@ -1,6 +1,6 @@
 mod data;
 
-use anyhow::Result;
+use anyhow::{Error, Result};
 use gloo_net::http::Request;
 use serde_json::json;
 use web_sys::RequestMode;
@@ -29,7 +29,13 @@ impl Session {
         }
     }
 
-    pub fn login(&self, username: String, password: String, callback: Callback<Result<String>>) {
+    pub fn login(
+        &self,
+        username: String,
+        password: String,
+        callback: Callback<(Result<String>, Callback<Result<()>>)>,
+        status_callback: Callback<Result<()>>,
+    ) {
         let url = format!("{}/account/authenticate", &self.base_url);
 
         let body = json!({
@@ -39,16 +45,25 @@ impl Session {
 
         let call = async move {
             let request = Request::post(&url).mode(RequestMode::Cors).json(&body)?;
-            let response = request
-                .send()
-                .await?
-                .json::<data::AccountAuthenticateResponse>()
-                .await?;
+            let response = request.send().await?;
 
-            Ok(response.token)
+            match response.status() {
+                200 => Ok(response
+                    .json::<data::AccountAuthenticateResponse>()
+                    .await?
+                    .token),
+                400 => Err(Error::msg(format!("Bad request"))),
+                401 => Err(Error::msg(format!("Wrong password!"))),
+                403 => Err(Error::msg(format!("You're not allowed to do this!"))),
+                404 => Err(Error::msg(format!("Unknown username!"))),
+                424 => Err(Error::msg(format!("This account is not verified!"))),
+                e => Err(Error::msg(format!("Unknown response: {e}"))),
+            }
         };
 
-        wasm_bindgen_futures::spawn_local(async move { callback.emit(call.await) });
+        wasm_bindgen_futures::spawn_local(
+            async move { callback.emit((call.await, status_callback)) },
+        );
     }
 
     pub fn set_token(&mut self, token: String) {
diff --git a/src/main.rs b/src/main.rs
index a7c1124..70e8aea 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -37,7 +37,7 @@ fn switch(routes: Route) -> Html {
 
 #[derive(Clone, PartialEq)]
 pub struct Callbacks {
-    pub sign_in_callback: Callback<Result<String>>,
+    pub sign_in_callback: Callback<(Result<String>, Callback<Result<()>>)>,
 }
 
 #[function_component]
@@ -47,12 +47,21 @@ fn App() -> Html {
 
     let cloned_state = state.clone();
     let callbacks = use_state(move || Callbacks {
-        sign_in_callback: Callback::from(move |response: Result<String>| {
-            let mut new_state = cloned_state.deref().clone();
+        sign_in_callback: Callback::from(
+            move |response: (Result<String>, Callback<Result<()>>)| {
+                let mut new_state = cloned_state.deref().clone();
 
-            new_state.set_token(response.expect("!!! remove this temporary expect !!!"));
-            cloned_state.set(new_state);
-        }),
+                response.1.emit(match response.0 {
+                    Ok(token) => {
+                        new_state.set_token(token);
+                        Ok(())
+                    }
+                    Err(e) => Err(e),
+                });
+
+                cloned_state.set(new_state);
+            },
+        ),
     });
 
     html! {
diff --git a/src/topbar/guest/mod.rs b/src/topbar/guest/mod.rs
index eaad046..107cb3f 100644
--- a/src/topbar/guest/mod.rs
+++ b/src/topbar/guest/mod.rs
@@ -2,6 +2,7 @@ mod signin;
 mod signup;
 
 use crate::topbar::Tab;
+use anyhow::Result;
 use signin::SignIn;
 use signup::SignUp;
 use std::rc::Rc;
@@ -10,11 +11,16 @@ use yew::prelude::*;
 pub enum Action {
     ToggleSignIn,
     ToggleSignUp,
+
+    SignInStatus(String),
 }
 
 pub struct State {
     sign_in: bool,
     sign_up: bool,
+
+    sign_in_status: AttrValue,
+    sign_up_status: AttrValue,
 }
 
 impl Default for State {
@@ -22,6 +28,9 @@ impl Default for State {
         Self {
             sign_in: false,
             sign_up: false,
+
+            sign_in_status: AttrValue::default(),
+            sign_up_status: AttrValue::default(),
         }
     }
 }
@@ -41,6 +50,11 @@ impl Reducible for State {
                 state.sign_in = false;
                 state.sign_up = !self.sign_up;
             }
+            Action::SignInStatus(s) => {
+                state.sign_in = true;
+                state.sign_up = false;
+                state.sign_in_status = s.into();
+            }
         }
         Rc::new(state)
     }
@@ -60,6 +74,14 @@ pub fn TopBar() -> Html {
         Callback::from(move |_| state.dispatch(Action::ToggleSignUp))
     };
 
+    let sign_in_status = {
+        let state = state.clone();
+        Callback::from(move |status: Result<()>| match status {
+            Ok(_) => state.dispatch(Action::ToggleSignIn),
+            Err(e) => state.dispatch(Action::SignInStatus(e.to_string())),
+        })
+    };
+
     html! {
         <nav id="topbar">
             <ul id="tabs-main" class="tabs">
@@ -75,7 +97,7 @@ pub fn TopBar() -> Html {
             </ul>
 
             if state.sign_in {
-                <SignIn/>
+                <SignIn status={state.sign_in_status.clone()} status_callback={sign_in_status}/>
             }
 
             if state.sign_up {
diff --git a/src/topbar/guest/signin.rs b/src/topbar/guest/signin.rs
index f11ea92..9a18f2d 100644
--- a/src/topbar/guest/signin.rs
+++ b/src/topbar/guest/signin.rs
@@ -1,5 +1,6 @@
 use crate::backend::Session;
 use crate::Callbacks;
+use anyhow::Result;
 use std::ops::Deref;
 use wasm_bindgen::JsCast;
 use web_sys::HtmlInputElement;
@@ -9,10 +10,17 @@ use yew::prelude::*;
 struct Data {
     pub username: String,
     pub password: String,
+    pub status: String,
+}
+
+#[derive(Properties, PartialEq)]
+pub struct Props {
+    pub status: AttrValue,
+    pub status_callback: Callback<Result<()>>,
 }
 
 #[function_component]
-pub fn SignIn() -> Html {
+pub fn SignIn(props: &Props) -> Html {
     let state = use_state(|| Data::default());
     let callbacks = use_context::<Callbacks>().expect("Callbacks context not available!");
     let session = use_context::<Session>().unwrap_or_default();
@@ -43,6 +51,7 @@ pub fn SignIn() -> Html {
         cloned_state.set(data);
     });
 
+    let status_callback = props.status_callback.clone();
     let onsubmit = Callback::from(move |event: SubmitEvent| {
         event.prevent_default();
 
@@ -52,6 +61,7 @@ pub fn SignIn() -> Html {
             state.username,
             state.password,
             callbacks.sign_in_callback.clone(),
+            status_callback.clone(),
         );
     });
 
@@ -70,6 +80,10 @@ pub fn SignIn() -> Html {
             <div class="center-x">
                 <button class="auth-submit" type="submit">{"Sign In"}</button>
             </div>
+
+            <div class="center-x">
+                <p class="auth-status">{props.status.clone()}</p>
+            </div>
         </form>
     }
 }
diff --git a/style/topbar.css b/style/topbar.css
index edd949d..4a4fa0e 100644
--- a/style/topbar.css
+++ b/style/topbar.css
@@ -107,6 +107,11 @@
     outline: none;
 }
 
+.auth-status {
+    font: normal 14px Roboto;
+    color: #ff0000;
+}
+
 .center-x {
     text-align: center;
 }
\ No newline at end of file