Validate a user
Header Parameters
Basic auth using access key as username and secret key as password.
Body Parameters
Unique identifier for the user in an external system. If provided, it will be used instead of Msisdn.
User's phone number. Required if ExternalUserId is not provided.
API Key provided by Tuned Global for accessing the service.
Response
Returns the user id (integer) if the user exists.
Invalid or missing credentials.
User not found.