credentials_service_account {gargle}

Load a service account token

Description

Load a service account token

Usage

credentials_service_account(scopes = NULL, path = "", ..., subject = NULL)

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.

path

JSON identifying the service account, in one of the forms supported for the txt argument of jsonlite::fromJSON() (typically, a file path or JSON string).

...

Additional arguments passed to all credential functions.

subject

An optional subject claim. Specify this if you wish to use the service account represented by path to impersonate the subject, who is a normal user. Before this can work, an administrator must grant the service account domain-wide authority. Identify the user to impersonate via their email, e.g. subject = "[e-mail]". Note that gargle automatically adds the non-sensitive "https://www.googleapis.com/auth/userinfo.email" scope, so this scope must be enabled for the service account, along with any other scopes being requested.

Details

Note that fetching a token for a service account requires a reasonably accurate system clock. For more information, see the vignette("how-gargle-gets-tokens").

Value

An httr::TokenServiceAccount or NULL.

See Also

Additional reading on delegation of domain-wide authority:

• https://developers.google.com/identity/protocols/oauth2/service-account#delegatingauthority

Other credential functions: credentials_app_default(), credentials_byo_oauth2(), credentials_external_account(), credentials_gce(), credentials_user_oauth2(), token_fetch()

Examples

## Not run: 
token <- credentials_service_account(
  scopes = "https://www.googleapis.com/auth/userinfo.email",
  path = "/path/to/your/service-account.json"
)

## End(Not run)