@callback handle_response({:ok, Tesla.Env.t()} | {:error, any()}, mapper()) ::
  {:ok, term()} | {:error, Plaid.Error.t()} | {:error, any()}

Handle an HTTP response from Plaid.

Takes response argument in the form of {:ok, Tesla.Env.t} or {:error, any()} and a 1-arity mapping function argument which is applied to the body of the Tesla.Env in the success case to unmarshal JSON into structured data.

Error cases are diverted into {:error, Plaid.Error.t} and {:error, any()} for handling Plaid and HTTP failure responses.

@callback send_request(Plaid.Client.Request.t(), Tesla.Client.t()) ::
  {:ok, Tesla.Env.t()} | {:error, any()}

Send an HTTP request to Plaid.

Takes a data structure Plaid.Request.t and Tesla client built at runtime and returns either {:ok, Tesla.Env.t} or {:error, any()}.