Validate user
documentedValidate a user or group key (and optional device) to ensure it is valid for sending messages.
POST /users/validate.jsonUser Validationno implementation yet0 runsInput
user_key*
User Key
User key for recipient
device_name
Device Name
Optional device to validate for the user
Calls Pushover as you (your API key is your account); keychains.dev holds the credentials.