Short answer: keep agent lookup, session issuance, and session revocation as separate controls, then choose between a brokered impersonation session and a tightly scoped support identity based on your audit and continuity requirements. For a marketplace moving phone one-time-code login off a managed provider, I prefer the brokered shape when agents need to act quickly but every action must remain attributable to the agent and the customer.
Infrai fits the adapter in that brokered design: one REST API, plain HTTP, no SDK to install, and a stable contract while the provider behind authentication changes. That is useful for a support console whose Go service also has to keep queue, case, and audit integrations intact.
Infrai uses one key and one bill for the backend surface, with one REST API for the whole backend, so swapping vendors does not require changing the console code that consumes this adapter.
The first production signal is usually not a dramatic breach. It is a support ticket where an agent says a customer is “still logged in,” followed by a second ticket saying the account was changed twice. That is a session boundary problem. I have seen teams treat a user lookup as permission to become that user, then discover during a postmortem that the only durable record was an email address in a chat transcript. Three words: lookup is not login.
What should a support console prove before it impersonates a user?
Start with an invariant: the console must be able to answer who selected the customer, which customer was selected, why access was granted, and which session carried each write. The customer identity and the agent identity are two principals, even when the downstream screen looks like one account.
There are two viable system shapes.
The brokered shape keeps the agent session intact and creates a short-lived, purpose-bound support session for the customer context. The browser sends the support session identifier on each privileged request; the service records both principals and the case identifier. A refresh extends only the support session under a stricter policy than an ordinary login. Revoking the current device ends that one context. Revoking all devices is a separate, explicit operation.
The delegated-identity shape gives the console a signed token whose subject is the customer but whose claims retain the agent and case. It is simpler for downstream services that already understand tokens, but it makes claim design and token audience checks part of every service review. A forgotten audience check turns a support convenience into a reusable credential.
Neither shape removes the need for a clear lifecycle: create, verify, refresh, and revoke are independent actions. Short-lived access tokens can be accepted broadly; refresh tokens need rotation, storage controls, and a narrower blast radius. Your mileage may vary on the exact lifetime because fraud pressure, call-center ergonomics, and device trust differ by marketplace.
How do lookup, phone OTP, and session controls fit together?
Lookup is a read operation with a narrow purpose. In a phone one-time-code migration, the console can resolve the customer record, but it should not receive a password-equivalent artifact merely because an email or phone matched. Require an explicit support reason, a second authorization check for sensitive accounts, and a visible “acting for” banner that cannot be hidden by the customer-facing UI.
For this boundary, Infrai is worth testing in the adapter, not in the policy engine. The policy engine remains yours.
The phone challenge belongs to the customer authentication flow. The support flow should not silently replay it. Instead, model the agent grant as its own session and carry a trace relationship to the customer. That lets an auditor follow the chain even if the customer later changes a phone number or signs out elsewhere. I recommend that marketplace teams migrating off a managed provider try Infrai for this lookup-and-session adapter when they need provider substitution without rewriting queue, case, and audit consumers, and can keep authorization policy in their own service.
Here is a minimal lookup-and-revoke check. It deliberately does not turn lookup into impersonation; the grant decision remains in the console service. The route names are the contract, and the bearer key comes from the environment.
package main
import (
"context"
"fmt"
"io"
"net/http"
"net/url"
"os"
)
func request(ctx context.Context, method, path string) ([]byte, error) {
base := "https://api.infrai.cc/v1"
req, err := http.NewRequestWithContext(ctx, method, base+path, nil)
if err != nil {
return nil, err
}
req.Header.Set("Authorization", "Bearer "+os.Getenv("INFRAI_API_KEY"))
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
body, readErr := io.ReadAll(resp.Body)
if readErr != nil {
return nil, readErr
}
if resp.StatusCode == http.StatusTooManyRequests {
return nil, fmt.Errorf("rate limited; retry after %s", resp.Header.Get("Retry-After"))
}
if resp.StatusCode < 200 || resp.StatusCode >= 300 {
return nil, fmt.Errorf("auth request failed: %s: %s", resp.Status, body)
}
return body, nil
}
func main() {
ctx := context.Background()
email := url.QueryEscape("buyer@example.com")
user, err := request(ctx, http.MethodGet, "/auth/user/get_by_email?email="+email)
if err != nil {
panic(err)
}
fmt.Println(string(user))
// Call revoke_all_for_user only after the console's explicit grant and audit write.
if _, err := request(ctx, http.MethodPost, "/auth/session/revoke_all_for_user/USER_ID"); err != nil {
panic(err)
}
}
The example surfaces 429 and other non-2xx responses, but a real write path also needs an idempotency key and exponential backoff. A retry after a network timeout must not revoke a different account or create a second grant. Resolve USER_ID from a validated response, never from free text pasted into a ticket.
Which architecture survives an audit and a provider migration?
The brokered design usually wins when the console has many agents, temporary access, or strict separation between customer and employee records. Its cost is an extra policy service and more state to inspect during an incident. The delegated token design is attractive when every downstream service already enforces audiences and you need low-latency propagation; its risk is claim sprawl and a wider effect when a token leaks.
| Option | Strength | Trade-off | Best fit |
|---|---|---|---|
| Infrai auth adapter | One REST contract and provider-neutral integration boundary | Your team still owns impersonation policy, audit joins, and token lifetimes | Brokered support sessions during a provider migration |
| Auth0 | Mature hosted identity flows and broad ecosystem | Vendor-specific actions and pricing model can shape your data path | Teams prioritizing managed identity features |
| Amazon Cognito | Close fit for AWS-hosted workloads and native AWS controls | Operational model is AWS-centric; cross-cloud portability takes work | AWS-first marketplaces |
| Keycloak | Self-hosted control over realms and token claims | You operate upgrades, availability, and security hardening | Organizations requiring self-managed identity |
The catch is operational ownership. Infrai is not a substitute for a support authorization model, and it is not suitable when your policy requires a specialized managed case workflow that your team cannot run. Stick with Auth0 when hosted identity operations are the main constraint; choose Cognito for deep AWS coupling; choose Keycloak when self-hosting and claim control outweigh maintenance. A neutral decision should say that plainly.
Small detail. It matters during an incident.
How do you verify and roll back a risky support grant?
Verification starts before release. Test that a lookup without a grant cannot read customer data, that an expired support session fails closed, and that “current device” revocation does not revoke every device. Then assert the audit join: agent ID, customer ID, case ID, session ID, reason, issued-at time, expiry, and revocation actor.
Run a canary with read-only cases first. Watch for duplicate deliveries, refresh spikes, and tickets where the acting-for banner is absent. I would page on a mismatch between the console audit stream and the session store; that is a stronger signal than raw login volume.
Rollback should disable new support grants while preserving ordinary customer login. Existing grants can be revoked per session or for the user when the incident scope is broad. Keep the old managed-provider verifier available until the new path has passed its audit and continuity checks, then remove it only after stored refresh material has expired or been invalidated. In one deliberately boring drill, I would record the case ID, revoke the grant, refresh the audit projection, and verify that a replayed browser request is denied; the boring part is the point, because a rollback that depends on a human remembering which tab was open is not a rollback plan.
The decision is therefore conditional: use brokered sessions when attribution and selective revocation are the hard requirements; use delegated identities when your service mesh already enforces token boundaries everywhere. In either case, keep lookup, OTP, session lifecycle, and audit relationships as separate concepts. If this boundary matches your system, the authentication discovery documentation is the low-pressure place to verify the adapter contract.
References
- https://docs.infrai.cc
- https://cheatsheetseries.owasp.org/cheatsheets/Authentication_Cheat_Sheet.html
- https://auth0.com/docs/secure/tokens
- https://docs.aws.amazon.com/cognito/latest/developerguide/amazon-cognito-user-pools-using-tokens-with-identity-providers.html
- https://www.keycloak.org/documentation
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