Problem

The package httr provides CURL wrappers in R (see package documentation).

I'm brand new to HTTP and APIs. My trouble is getting oauth2.0 authentication to work. I have tried various syntax and get either errors or status 401.

What is the correct way to use an oauth2.0 token and make a GET() request using httr?

Code Attempts

# Set UP
  
  url = "https://canvas.{institution}.edu/api/v1/courses"
  key = "{secret_key}"

# 1
  GET(url, sign_oauth2.0(key)) 
  # Error: Deprecated: supply token object to config directly

# 2
  GET(url, config(sign_oauth2.0 = key)) 
  # unknown option: sign_oauth2.0

# 3
  GET(url, config = list(sign_oauth2.0 = key)) 
  # Status 401