sessionToken property
A string which identifies an Autocomplete session for billing purposes.
Must be a URL and filename safe base64 string with at most 36 ASCII
characters in length. Otherwise an INVALID_ARGUMENT error is returned. The
session begins when the user starts typing a query, and concludes when
they select a place and a call to Place Details or Address Validation is
made. Each session can have multiple queries, followed by one Place
Details or Address Validation request. The credentials used for each
request within a session must belong to the same Google Cloud Console
project. Once a session has concluded, the token is no longer valid; your
app must generate a fresh token for each session. If the session_token
parameter is omitted, or if you reuse a session token, the session is
charged as if no session token was provided (each request is billed
separately). We recommend the following guidelines: * Use session tokens
for all Place Autocomplete calls. * Generate a fresh token for each
session. Using a version 4 UUID is recommended. * Ensure that the
credentials used for all Place Autocomplete, Place Details, and Address
Validation requests within a session belong to the same Cloud Console
project. * Be sure to pass a unique session token for each new session.
Using the same token for more than one session will result in each request
being billed individually.
Optional.
Implementation
core.String? sessionToken;