[HELP] API rest OAuth 2

[emurilloEcourbes]

Description
I have a device where I pull the data using API Rest. The API uses OAuth 2 with the client credentials flow

For obtaining the token, I execute a POST request to the provided address (e.g. /api/token)
The request headers must contain: Accept: application/json
The request body must specify the client id, the client secret and the client_credentials grant type

Once I have obtained the token, I must supply it in each API call.
The request headers must contain:

Accept: application/json
Authorization: Bearer {token}

I don't know how to do it in the IOT gateway.

Environment

OS: Ubuntu
ThingsBoard: 3.5.1
Browser: Chrome

[samson0v]

Hi @emurilloEcourbes, thanks for your interest in ThingsBoard IoT Gateway!
If you using Request Connector, you can use httpHeaders config parameter and configuration will look like:

More information about Request Connector in the official documentation.

[emurilloEcourbes]

Thnaks @samson0v for your reply. In my case the token expires in 3600 seconds, it's a third party application so I can not modify it. What is the best way to refresh the do it?