diff --git a/src/Umbraco.Web.UI.Client/apps/auth/src/auth.context.ts b/src/Umbraco.Web.UI.Client/apps/auth/src/auth.context.ts
index b2c224191f..274368a825 100644
--- a/src/Umbraco.Web.UI.Client/apps/auth/src/auth.context.ts
+++ b/src/Umbraco.Web.UI.Client/apps/auth/src/auth.context.ts
@@ -3,6 +3,16 @@ import { LoginRequestModel, IUmbAuthContext } from './types';
 export class UmbAuthContext implements IUmbAuthContext {
 	readonly #AUTH_URL = '/umbraco/management/api/v1/security/back-office';
 
+	getErrorText(response: Response) {
+		switch (response.status) {
+			case 401:
+				return 'Oops! It seems like your login credentials are invalid or expired. Please double-check your username and password and try again.';
+
+			default:
+				return response.statusText;
+		}
+	}
+
 	async login(data: LoginRequestModel) {
 		//TODO: call authUrl with data
 		const request = new Request(this.#AUTH_URL + '/login', {
@@ -17,20 +27,6 @@ export class UmbAuthContext implements IUmbAuthContext {
 		});
 		const response = await fetch(request);
 
-		return { error: response.ok ? undefined : response.statusText };
-	}
-}
-
-class UmbMockAPI {
-	static async loginSuccess(data: LoginRequestModel) {
-		await new Promise((resolve) => setTimeout(resolve, 1000));
-
-		return {};
-	}
-
-	static async loginFail(data: LoginRequestModel) {
-		await new Promise((resolve) => setTimeout(resolve, 1000));
-
-		return { error: 'Invalid credentials' };
+		return { error: response.ok ? undefined : this.getErrorText(response) };
 	}
 }