Wrapper for sending queries and payloads to API

There are a number of different GET and POST endpoints in the GWAS database API. This is a generic way to access them.

Usage

api_query(
  path,
  query = NULL,
  access_token = check_access_token(),
  method = "GET",
  silent = TRUE,
  encode = "json",
  timeout = 300
)

path: Either a full query path (e.g. for get) or an endpoint (e.g. for post) queries
query: If post query, provide a list of arguments as the payload. NULL by default
access_token: Google OAuth2 access token. Used to authenticate level of access to data. By default, checks if already authenticated through get_access_token and if not then does not perform authentication
method: "GET" (default) or "POST", "DELETE" etc
silent: TRUE/FALSE to be passed to httr call. TRUE by default
encode: Default = "json", see httr::POST for options
timeout: Default = 300, avoid increasing this, preferentially simplify the query first.

httr response object