curl --location --request POST 'https://api.rexpay.app/auth/access-token' \
--header 'x-api-key: <api-key>' \
--header 'Content-Type: application/json' \
--data-raw '{
"client_id": "string",
"client_secret": "string"
}'{
"access_token": "string",
"id_token": "string",
"expires_in": 0,
"token_type": "string"
}