Input fields
String
Lookup by phone number (E.164 format recommended, e.g., +14155551234).
10-digit US numbers are automatically normalized.
String
Lookup by email address (case-insensitive).
Input objects
UserLookupInput
Input for looking up a user recipient by a specific identifier.
Input object
Input for looking up a user recipient by a specific identifier.
Exactly one identifier must be provided.