diff --git a/src/tests/api/get_auth_logic.rs b/src/tests/api/get_auth_logic.rs
new file mode 100644
index 0000000..8191c25
--- /dev/null
+++ b/src/tests/api/get_auth_logic.rs
@@ -0,0 +1,128 @@
+use crate::api::auth::{Token, TokenType};
+use crate::api::server::server::ecdar_api_auth_server::EcdarApiAuth;
+use crate::api::server::server::get_auth_token_request::{user_credentials, UserCredentials};
+use crate::api::server::server::GetAuthTokenRequest;
+use crate::entities::{session, user};
+use crate::tests::api::helpers::{get_mock_concrete_ecdar_api, get_mock_services};
+use std::env;
+use std::str::FromStr;
+use tonic::{metadata, Code, Request};
+
+#[tokio::test]
+async fn get_auth_token_from_credentials_returns_ok() {
+    let mut mock_services = get_mock_services();
+
+    let request = GetAuthTokenRequest {
+        user_credentials: Option::from(UserCredentials {
+            password: "Password123".to_string(),
+            user: Option::from(user_credentials::User::Username("Example".to_string())),
+        }),
+    };
+
+    mock_services
+        .user_context_mock
+        .expect_get_by_username()
+        .returning(move |_| {
+            Ok(Option::from(user::Model {
+                id: 1,
+                email: "".to_string(),
+                username: "Example".to_string(),
+                password: "".to_string(),
+            }))
+        });
+
+    mock_services
+        .hashing_context_mock
+        .expect_verify_password()
+        .returning(move |_, _| true);
+
+    mock_services
+        .session_context_mock
+        .expect_create()
+        .returning(move |_| {
+            Ok(session::Model {
+                id: 0,
+                refresh_token: "refresh_token".to_string(),
+                access_token: "access_token".to_string(),
+                updated_at: Default::default(),
+                user_id: 1,
+            })
+        });
+
+    let api = get_mock_concrete_ecdar_api(mock_services);
+    let response = api.get_auth_token(Request::new(request)).await.unwrap();
+
+    assert!(!response.get_ref().refresh_token.is_empty());
+    assert!(!response.get_ref().access_token.is_empty());
+}
+
+#[tokio::test]
+async fn get_auth_token_from_token_returns_ok() {
+    env::set_var("REFRESH_TOKEN_HS512_SECRET", "refresh_secret");
+
+    let mut mock_services = get_mock_services();
+
+    let mut request = Request::new(GetAuthTokenRequest {
+        user_credentials: None,
+    });
+
+    let refresh_token = Token::new(TokenType::RefreshToken, "1").unwrap();
+
+    request.metadata_mut().insert(
+        "authorization",
+        metadata::MetadataValue::from_str(format!("Bearer {}", refresh_token).as_str()).unwrap(),
+    );
+
+    mock_services
+        .session_context_mock
+        .expect_get_by_token()
+        .returning(move |_, _| {
+            Ok(Option::from(session::Model {
+                id: 0,
+                refresh_token: "refresh_token".to_string(),
+                access_token: "access_token".to_string(),
+                updated_at: Default::default(),
+                user_id: 1,
+            }))
+        });
+
+    mock_services
+        .session_context_mock
+        .expect_update()
+        .returning(move |_| {
+            Ok(session::Model {
+                id: 0,
+                refresh_token: "refresh_token".to_string(),
+                access_token: "access_token".to_string(),
+                updated_at: Default::default(),
+                user_id: 1,
+            })
+        });
+
+    let api = get_mock_concrete_ecdar_api(mock_services);
+
+    let response = api.get_auth_token(request).await.unwrap();
+
+    assert!(!response.get_ref().refresh_token.is_empty());
+    assert!(!response.get_ref().access_token.is_empty());
+}
+
+#[tokio::test]
+async fn get_auth_token_from_invalid_token_returns_err() {
+    let mock_services = get_mock_services();
+
+    let mut request = Request::new(GetAuthTokenRequest {
+        user_credentials: None,
+    });
+
+    request.metadata_mut().insert(
+        "authorization",
+        metadata::MetadataValue::from_str("invalid token").unwrap(),
+    );
+
+    let api = get_mock_concrete_ecdar_api(mock_services);
+
+    let response = api.get_auth_token(request).await;
+
+    assert_eq!(response.unwrap_err().code(), Code::Unauthenticated);
+}