Get Credential Authentication Function

Creates a function that retrieves authentication tokens and formats them as HTTP Authorization headers. This function handles credential discovery and returns a callable method that generates Bearer token headers when invoked.

Usage

get_credential_auth(
  scope = NULL,
  tenant_id = NULL,
  client_id = NULL,
  client_secret = NULL,
  use_cache = "disk",
  offline = TRUE,
  chain = default_credential_chain()
)

Arguments

scope

Optional character string specifying the authentication scope.

tenant_id

Optional character string specifying the tenant ID for authentication.

client_id

Optional character string specifying the client ID for authentication.

client_secret

Optional character string specifying the client secret for authentication.

use_cache

Character string indicating the caching strategy. Defaults to "disk". Options include "disk" for disk-based caching or "memory" for in-memory caching.

offline

Logical. If TRUE, adds 'offline_access' to the scope to request a 'refresh_token'. Defaults to TRUE.

chain

A list of credential objects, where each element must inherit from the Credential base class. Credentials are attempted in the order provided until get_token succeeds.

Value

A function that, when called, returns a named list with an Authorization element containing the Bearer token, suitable for use with httr2::req_headers().

See also

get_token(), get_request_authorizer(), get_token_provider()

Examples

if (FALSE) { # \dontrun{
# Create an authentication function
auth_fn <- get_credential_auth(
  scope = "https://graph.microsoft.com/.default"
)

# Call it to get headers
auth_headers <- auth_fn()

# Use with httr2
req <- httr2::request("https://graph.microsoft.com/v1.0/me") |>
  httr2::req_headers(!!!auth_headers)
} # }