Refresh device or user token

Use this endpoint to refresh device token or user token acquired from the public API /login call. Endpoint is available at /token relative path.

Parameters:

client_id: unique client ID. Use "api" value for user token acquired from the public API
client_secret: API key
grant_type: refresh_token
refresh_token: the refresh token

Return value:
The Error object if error occurred, otherwise Token JSON object with the following structure:

{
    "token_type": "Bearer",
    "expires_in": NNN,
    "access_token": "xxx",
    "refresh_token": "yyy"
}