created a localised login system

src/AUTH/AuthServiceBase.js

@@ -0,0 +1,34 @@
+/**
+ * Abstract base class for authentication services
+ * This provides a common interface for different authentication providers
+ */
+export class AuthServiceBase {
+  constructor() {
+    if (new.target === AuthServiceBase) {
+      throw new TypeError('Cannot instantiate abstract class');
+    }
+  }
+
+  async authenticate() {
+    throw new Error('authenticate() must be implemented');
+  }
+
+  async getAccessToken() {
+    throw new Error('getAccessToken() must be implemented');
+  }
+
+  async refreshToken() {
+    throw new Error('refreshToken() must be implemented');
+  }
+
+  async revokeAccess() {
+    throw new Error('revokeAccess() must be implemented');
+  }
+
+  async getUserInfo() {
+    throw new Error('getUserInfo() must be implemented');
+  }
+}
+
+export default AuthServiceBase;
+