sequenceDiagram
Client Service->>+API Gateway: Send authentication token
activate API Gateway
Note right of API Gateway: Not over limitation <br/> or Device exists
API Gateway-->>Client Service: Response HTTP 200 OK
deactivate API Gateway
Note over Client Service, API Gateway: Response payload: {"Cmd": "Auth",<br/> "DeviceId": DeviceId,<br/> "PWD": Password<br/>}