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. Use cred_funs_list() to see the current registry, in order. See the
vignette How gargle gets tokens for a
full description of token_fetch().
token_fetch(scopes = NULL, ...)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. It is considered a low value scope and
does not appear on the consent screen.
Additional arguments passed to all credential functions.
An httr::Token or NULL.
Other credential functions:
credentials_app_default(),
credentials_byo_oauth2(),
credentials_gce(),
credentials_service_account(),
credentials_user_oauth2()
# NOT RUN {
token_fetch(scopes = "https://www.googleapis.com/auth/userinfo.email")
# }
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