POST
curl -i -X POST \
https://api.spensepay.com/partner/auth/token \
-H 'Content-Type: application/x-www-form-urlencoded' \
-d grant_type=client_credentials \
-d scope= \
-d client_id=your_client_id \
-d client_secret=your_client_secretResponse
{ "access_token": "123e4567-e89b-12d3-a456-426614174000", "token_type": "bearer", "expires_in": 3600 }