oauth-client.md
In httr2: Perform HTTP Requests and Process the Responses

can check app has needed pieces

Code
  oauth_flow_check("test", NULL)
Condition
  Error:
  ! `client` must be an OAuth client created with `oauth_client()`.
Code
  oauth_flow_check("test", client, is_confidential = TRUE)
Condition
  Error:
  ! Can't use this `app` with OAuth 2.0 test flow.
  i `app` must have a confidential client (i.e. `client_secret` is required).
Code
  oauth_flow_check("test", client, interactive = TRUE)
Condition
  Error:
  ! OAuth 2.0 test flow requires an interactive session

checks auth types have needed args

Code
  oauth_client("abc", "http://x.com", auth = "header")
Condition
  Error in `oauth_client()`:
  ! `auth = 'header'` requires a `secret`.
Code
  oauth_client("abc", "http://x.com", auth = "jwt_sig")
Condition
  Error in `oauth_client()`:
  ! `auth = 'jwt_sig'` requires a `key`.
Code
  oauth_client("abc", "http://x.com", key = "abc", auth = "jwt_sig")
Condition
  Error in `oauth_client()`:
  ! `auth = 'jwt_sig'` requires a claim specification in `auth_params`.
Code
  oauth_client("abc", "http://x.com", auth = 123)
Condition
  Error in `oauth_client()`:
  ! `auth` must be a string or function.

client has useful print method

Code
  oauth_client("x", url)
Message
  <httr2_oauth_client>
  * name     : "bf27508f7925b06bf28a10f3805351ab"
  * id       : "x"
  * token_url: "http://example.com"
  * auth     : "oauth_client_req_auth_body"
Code
  oauth_client("x", url, secret = "SECRET")
Message
  <httr2_oauth_client>
  * name     : "bf27508f7925b06bf28a10f3805351ab"
  * id       : "x"
  * secret   : <REDACTED>
  * token_url: "http://example.com"
  * auth     : "oauth_client_req_auth_body"
Code
  oauth_client("x", url, auth = function(...) {
    xxx
  })
Message
  <httr2_oauth_client>
  * name     : "bf27508f7925b06bf28a10f3805351ab"
  * id       : "x"
  * token_url: "http://example.com"
  * auth     : <function>