This is a rather magical function that calls a series of concrete
credential-fetching functions, each wrapped in a tryCatch().
token_fetch() keeps trying until it succeeds or there are no more functions
to try. See the vignette("how-gargle-gets-tokens") for a full description
of token_fetch().
Arguments
- scopes
A character vector of scopes to request. Pick from those listed at https://developers.google.com/identity/protocols/oauth2/scopes.
For certain token flows, the
"https://www.googleapis.com/auth/userinfo.email"scope is unconditionally included. This grants permission to retrieve the email address associated with a token; gargle uses this to index cached OAuth tokens. This grants no permission to view or send email and is generally considered a low-value scope.- ...
Additional arguments passed to all credential functions.
Value
An httr::Token (often an instance of something
that inherits from httr::Token) or NULL.
See also
cred_funs_list() reveals the current registry of
credential-fetching functions, in order.
Other credential functions:
credentials_app_default(),
credentials_byo_oauth2(),
credentials_external_account(),
credentials_gce(),
credentials_service_account(),
credentials_user_oauth2()