docs(login): add explanation for waiting duration

deadlock-plugins/deadlock-extension/src/core/keycloakOAuth2DeviceFlowConnection.ts

@@ -14,6 +14,14 @@ export default class KeycloakOAuth2DeviceFlowConnection {
   private deviceAuthorizationRequestResponseData: DeviceAuthorizationRequestResponseData;
 
   constructor(private deviceUrl: string, private tokenUrl: string, private userInfoUrl: string) {
+    /*
+     * Arbitrary durations to wait in seconds \
+     * Waiting time between requests should be increasing
+     * if Keycloak api reponds with error code `slow_down` \
+     * otherwise, it will continue to respond with this error code. \
+     * The minimal waiting duration has been chosen to not be too short: \
+     * Keycloak may saturate and crash due to too many requests.
+     */
     this.waitDuration = new WaitDuration([5_000, 5_000, 5_000, 10_000, 10_000, 10_000, 30_000, 30_000, 100_000]);
     this.accessToken = '';
     this.refreshToken = '';